Collaboration
Monthly
Remote code execution in Zimbra Collaboration (ZCS) before 10.1.20 enables unauthenticated network attackers to execute arbitrary operating system commands as the Zimbra service account by sending specially crafted SMTP requests that trigger unsanitized input processing in the SNMP notification subsystem. Exploitation is conditional on the non-default zimbra-snmp package being installed and SNMP notifications being enabled, which meaningfully narrows the exposed population despite the CVSS 8.9 score. No public exploit code and no CISA KEV listing were identified at time of analysis.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Zimbra's sudo configuration permits the zimbra user to execute the zmslapd binary as root with arbitrary parameters. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
JWT signing secret forgery in Zimbra Collaboration before 10.1.17 stems from the zimbraDocumentEditingJwtSecret being generated with an insecure pseudo-random number generator, yielding insufficient entropy. An authenticated attacker who captures a JWT token from the OnlyOffice integration can perform offline brute-force to recover the signing secret, then mint arbitrary forged tokens - enabling impersonation or unauthorized document access within the OnlyOffice workflow. No public exploit code and no CISA KEV listing have been identified at time of analysis; exploitation requires multi-step conditions including a valid Zimbra account and captured JWT traffic.
Cross-site request forgery in Zimbra Collaboration's Exchange Web Services (EWS) endpoint (versions before 10.1.17) allows a network-based attacker to perform unauthorized actions on behalf of an authenticated victim by exploiting insufficient content-type validation. Exploitation requires tricking a logged-in Zimbra user into interacting with attacker-controlled content, after which the browser automatically submits a crafted EWS request within the victim's session context. No public exploit has been identified and this CVE is absent from the CISA KEV catalog; the CVSS score of 3.1 accurately reflects the high attack complexity and integrity-only impact bounded to the victim's account.
Local file inclusion in Zimbra Collaboration's Classic Web Client (versions before 10.1.17) exposes protected server-side files via the Forward servlet's unvalidated 'fu' request parameter. An attacker supplying a crafted path can read files such as WEB-INF/web.xml, leaking application configuration including database credentials, internal class mappings, and security settings. The vulnerability carries a low CVSS score of 3.1, but the confidentiality impact of web.xml disclosure can be disproportionately severe since that file often contains secrets used to pivot further. No public exploit code or CISA KEV listing has been identified at time of analysis.
Path traversal in Zimbra Collaboration Suite (ZCS) Briefcase document editing exposes sensitive web application files to authenticated low-privileged users. The vulnerability stems from improper validation of the `packages` parameter, enabling directory escape via crafted traversal sequences. No public exploit code or CISA KEV listing has been identified at time of analysis; the vendor has released a fix in version 10.1.17.
Stored XSS in Zimbra Collaboration Classic Web Client before 10.1.17 enables remote, unauthenticated attackers to deliver malicious JavaScript via crafted email attachments, which executes in the victim's browser session upon inline preview. Affected organizations running ZCS versions prior to 10.1.17 are exposed to session hijacking, unauthorized webmail actions, and data exfiltration without the attacker needing any account on the target system. No active exploitation has been confirmed by CISA KEV, and no public exploit code has been identified at time of analysis, but the email delivery vector requires no attacker foothold and lowers the exploitation barrier significantly.
Authorization bypass in Zimbra Collaboration (ZCS) before 10.1.17 allows authenticated users to impersonate other accounts and send emails by exploiting improper permission validation in the SaveDraftRequest SOAP handler. An attacker with a valid low-privilege account can craft SOAP requests that circumvent delegation and send-as permission checks, enabling unauthorized email impersonation without possessing the required access grants. No active exploitation has been confirmed (no CISA KEV listing) and no public exploit code has been identified at time of analysis; the CVSS score of 3.1 reflects the constrained real-world impact.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 10.1.x before 10.1.1, 10.0.x before 10.0.9, 9.0.0 before Patch 41, and 8.8.15 before Patch 46. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0, issue 1 of 2. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An XSS issue was discovered in a web endpoint in Zimbra Collaboration (ZCS) before 10.0.4 via an unsanitized parameter. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.4. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
File Upload vulnerability in Zimbra ZCS 8.8.15 allows an authenticated privileged user to execute arbitrary code and obtain sensitive information via the ClientUploader function. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue in Zimbra Collaboration ZCS v.8.8.15 and v.9.0 allows an attacker to execute arbitrary code via the sfdc_preauth.jsp component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in Zimbra Collaboration (ZCS) v.8.8.15 and v.9.0 allows a remote attacker to escalate privileges and obtain sensitive information via the password and 2FA parameters. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite through 9.0 and 8.8.15, an attacker (who has initial user access to a Zimbra server instance) can execute commands as root by passing one of JVM arguments, leading to. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Command Injection vulnerability could allow attackers to inject arbitrary commands into system command execution.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 8.8.15. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0 and 8.8.15. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, at the URL /h/calendar, one can trigger XSS by adding JavaScript code to the view parameter and changing the value of the uncheck parameter to a string. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, /h/search?action=voicemail&action=listen accepts a phone parameter that is vulnerable to Reflected XSS. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/compose accepts an attachUrl parameter that is vulnerable to Reflected XSS. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.x and 9.x (e.g., 8.8.15). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/search?action accepts parameters called extra, title, and onload that are partially sanitised and lead to reflected XSS that allows executing. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
An issue was discovered in the webmail component in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. Rated medium severity (CVSS 5.7), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Request Forgery (CSRF) vulnerability could allow attackers to trick authenticated users into performing unintended actions.
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Server-Side Request Forgery (SSRF) vulnerability could allow attackers to make the server perform requests to unintended internal or external resources.
Zimbra Collaboration Open Source 8.8.15 does not encrypt the initial-login randomly created password (from the "zmprove ca" command). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in ZmMailMsgView.js in the Calendar Invite component in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.0 before 9.0.0 Patch 16. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite Network Edition versions < 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, which is vulnerable to XXE attacks. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Remote code execution in Zimbra Collaboration (ZCS) before 10.1.20 enables unauthenticated network attackers to execute arbitrary operating system commands as the Zimbra service account by sending specially crafted SMTP requests that trigger unsanitized input processing in the SNMP notification subsystem. Exploitation is conditional on the non-default zimbra-snmp package being installed and SNMP notifications being enabled, which meaningfully narrows the exposed population despite the CVSS 8.9 score. No public exploit code and no CISA KEV listing were identified at time of analysis.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Zimbra's sudo configuration permits the zimbra user to execute the zmslapd binary as root with arbitrary parameters. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
JWT signing secret forgery in Zimbra Collaboration before 10.1.17 stems from the zimbraDocumentEditingJwtSecret being generated with an insecure pseudo-random number generator, yielding insufficient entropy. An authenticated attacker who captures a JWT token from the OnlyOffice integration can perform offline brute-force to recover the signing secret, then mint arbitrary forged tokens - enabling impersonation or unauthorized document access within the OnlyOffice workflow. No public exploit code and no CISA KEV listing have been identified at time of analysis; exploitation requires multi-step conditions including a valid Zimbra account and captured JWT traffic.
Cross-site request forgery in Zimbra Collaboration's Exchange Web Services (EWS) endpoint (versions before 10.1.17) allows a network-based attacker to perform unauthorized actions on behalf of an authenticated victim by exploiting insufficient content-type validation. Exploitation requires tricking a logged-in Zimbra user into interacting with attacker-controlled content, after which the browser automatically submits a crafted EWS request within the victim's session context. No public exploit has been identified and this CVE is absent from the CISA KEV catalog; the CVSS score of 3.1 accurately reflects the high attack complexity and integrity-only impact bounded to the victim's account.
Local file inclusion in Zimbra Collaboration's Classic Web Client (versions before 10.1.17) exposes protected server-side files via the Forward servlet's unvalidated 'fu' request parameter. An attacker supplying a crafted path can read files such as WEB-INF/web.xml, leaking application configuration including database credentials, internal class mappings, and security settings. The vulnerability carries a low CVSS score of 3.1, but the confidentiality impact of web.xml disclosure can be disproportionately severe since that file often contains secrets used to pivot further. No public exploit code or CISA KEV listing has been identified at time of analysis.
Path traversal in Zimbra Collaboration Suite (ZCS) Briefcase document editing exposes sensitive web application files to authenticated low-privileged users. The vulnerability stems from improper validation of the `packages` parameter, enabling directory escape via crafted traversal sequences. No public exploit code or CISA KEV listing has been identified at time of analysis; the vendor has released a fix in version 10.1.17.
Stored XSS in Zimbra Collaboration Classic Web Client before 10.1.17 enables remote, unauthenticated attackers to deliver malicious JavaScript via crafted email attachments, which executes in the victim's browser session upon inline preview. Affected organizations running ZCS versions prior to 10.1.17 are exposed to session hijacking, unauthorized webmail actions, and data exfiltration without the attacker needing any account on the target system. No active exploitation has been confirmed by CISA KEV, and no public exploit code has been identified at time of analysis, but the email delivery vector requires no attacker foothold and lowers the exploitation barrier significantly.
Authorization bypass in Zimbra Collaboration (ZCS) before 10.1.17 allows authenticated users to impersonate other accounts and send emails by exploiting improper permission validation in the SaveDraftRequest SOAP handler. An attacker with a valid low-privilege account can craft SOAP requests that circumvent delegation and send-as permission checks, enabling unauthorized email impersonation without possessing the required access grants. No active exploitation has been confirmed (no CISA KEV listing) and no public exploit code has been identified at time of analysis; the CVSS score of 3.1 reflects the constrained real-world impact.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 10.1.x before 10.1.1, 10.0.x before 10.0.9, 9.0.0 before Patch 41, and 8.8.15 before Patch 46. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0, issue 1 of 2. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An XSS issue was discovered in a web endpoint in Zimbra Collaboration (ZCS) before 10.0.4 via an unsanitized parameter. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.4. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
File Upload vulnerability in Zimbra ZCS 8.8.15 allows an authenticated privileged user to execute arbitrary code and obtain sensitive information via the ClientUploader function. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue in Zimbra Collaboration ZCS v.8.8.15 and v.9.0 allows an attacker to execute arbitrary code via the sfdc_preauth.jsp component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in Zimbra Collaboration (ZCS) v.8.8.15 and v.9.0 allows a remote attacker to escalate privileges and obtain sensitive information via the password and 2FA parameters. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite through 9.0 and 8.8.15, an attacker (who has initial user access to a Zimbra server instance) can execute commands as root by passing one of JVM arguments, leading to. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Command Injection vulnerability could allow attackers to inject arbitrary commands into system command execution.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 8.8.15. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0 and 8.8.15. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, at the URL /h/calendar, one can trigger XSS by adding JavaScript code to the view parameter and changing the value of the uncheck parameter to a string. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, /h/search?action=voicemail&action=listen accepts a phone parameter that is vulnerable to Reflected XSS. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/compose accepts an attachUrl parameter that is vulnerable to Reflected XSS. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 9.0. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.x and 9.x (e.g., 8.8.15). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/search?action accepts parameters called extra, title, and onload that are partially sanitised and lead to reflected XSS that allows executing. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
An issue was discovered in the webmail component in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. Rated medium severity (CVSS 5.7), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Request Forgery (CSRF) vulnerability could allow attackers to trick authenticated users into performing unintended actions.
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Server-Side Request Forgery (SSRF) vulnerability could allow attackers to make the server perform requests to unintended internal or external resources.
Zimbra Collaboration Open Source 8.8.15 does not encrypt the initial-login randomly created password (from the "zmprove ca" command). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in ZmMailMsgView.js in the Calendar Invite component in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.0 before 9.0.0 Patch 16. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Zimbra Collaboration Suite Network Edition versions < 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, which is vulnerable to XXE attacks. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.