Which versions of Mailenable are affected by CVE-2026-32851?

CVE-2026-32851 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 5.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users.. A patch is available.

Is there a public PoC exploit available for CVE-2026-32851?

Yes, a public proof-of-concept exploit is available for CVE-2026-32851. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-32851?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Mailenable CVE-2026-32851

Q: What is the CVSS score of CVE-2026-32851?

CVE-2026-32851 has a CVSS 4.0 base score of 5.1 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

EUVD-2026-14520 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-03-23 VulnCheck

GHSA-5fjm-c352-35cv

XSS Mailenable

5.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.1 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

PoC Detected

Mar 30, 2026 - 14:30 vuln.today

Public exploit code

EUVD ID Assigned

Mar 23, 2026 - 19:30 euvd

EUVD-2026-14520

Analysis Generated

Mar 23, 2026 - 19:30 vuln.today

Patch released

Mar 23, 2026 - 19:30 nvd

Patch available

CVE Published

Mar 23, 2026 - 19:06 nvd

MEDIUM 5.1

DescriptionCVE.org

MailEnable versions prior to 10.55 contain a reflected cross-site scripting vulnerability in the webmail interface that allows remote attackers to execute arbitrary JavaScript in a victim's browser by crafting a malicious URL. Attackers can inject malicious code through the Attendees parameter in the FreeBusy.aspx form, which is not properly sanitized before being embedded into dynamically generated JavaScript.

AnalysisAI

MailEnable versions prior to 10.55 contain a reflected cross-site scripting (XS) vulnerability in the webmail interface that allows remote attackers to execute arbitrary JavaScript in a victim's browser without requiring authentication or special privileges. The vulnerability exists in the FreeBusy.aspx form where the Attendees parameter is not properly sanitized before being embedded into dynamically generated JavaScript, enabling attackers to craft malicious URLs that compromise user sessions and steal sensitive data. …

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Vulnerability AssessmentAI

Risk Assessment	While CVSS and EPSS scores are not explicitly provided, the attack vector is network-based with low complexity and no privilege requirements, indicating a high-severity profile typical of reflected XSS flaws. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker crafts a malicious URL containing JavaScript payload in the Attendees parameter of FreeBusy.aspx (e.g., /FreeBusy.aspx?Attendees=<script>steal_session()</script>) and sends it to MailEnable users via phishing email or social engineering. When a victim clicks the link while authenticated to MailEnable webmail, the unvalidated payload executes in their browser with their session privileges, allowing the attacker to harvest session cookies, redirect to a credential-harvesting page, or perform actions on behalf of the victim such as reading emails or forwarding sensitive messages. …
Remediation	Immediately upgrade MailEnable to version 10.55 or later, as this version contains the required input sanitization and output encoding fixes. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-32851 vulnerability details – vuln.today

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