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Siteserver

4 CVEs vendor

Monthly

CVE-2026-7435 Apr 30, 20:09 HIGH This Week

SQL injection in SSCMS v7.4.0 enables high-privileged attackers to execute arbitrary SQL statements via the stl:sqlContent tag's queryString attribute. Attackers with administrative access can craft encrypted payloads to the /api/stl/actions/dynamic endpoint, bypassing parameterization controls to achieve database compromise, authentication bypass, or complete data exfiltration. EPSS data not available; no confirmed active exploitation (CISA KEV negative); public exploit code availability unknown but detailed technical advisory published by VulnCheck increases weaponization risk.

Authentication Bypass SQLi Sscms Siteserver
NVD GitHub VulDB
CVSS 4.0
8.6
EPSS
0.1%
CVE-2026-82486 Aug 30, 09:15 LOW Monitor

Improper access control in SiteServer SSCMS 7.4.0's Agent Installation Workflow allows remote attackers to bypass security restrictions by manipulating the SecurityKey argument, potentially gaining unauthorized access to protected functionality. The CVSS 4.0 score of 2.3 reflects genuine exploitation difficulty - high attack complexity and required passive user interaction significantly limit opportunistic abuse - though the authentication bypass characterization indicates a security boundary violation is achievable under the right conditions. No patch is available; the project has not responded to responsible disclosure submitted via GitHub issue #3898, and no public exploit has been identified at this time.

Authentication Bypass Sscms Siteserver
NVD VulDB GitHub
CVSS 4.0
2.3
EPSS
0.2%
CVE-2026-7429 Apr 30, 19:45 LOW Monitor

Reflected cross-site scripting in SSCMS v7.4.0 allows authenticated attackers to inject arbitrary JavaScript through crafted STL template payloads in the /api/stl/actions/dynamic endpoint. The vulnerability arises from improper output encoding when decrypted STL templates are returned in JSON responses, enabling session hijacking, credential theft via phishing, and unauthorized user actions. User interaction is required to trigger the payload, limiting but not eliminating real-world risk.

XSS Sscms Siteserver
NVD GitHub VulDB
CVSS 4.0
2.1
EPSS
0.0%
CVE-2019-11401 Apr 22, 11:29 NuGet HIGH POC PATCH This Week

A issue was discovered in SiteServer CMS 6.9.0. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

RCE File Upload Siteserver Cms Siteserver
NVD GitHub
CVSS 3.0
7.2
EPSS
2.9%
EPSS 0% CVSS 8.6
HIGH This Week

SQL injection in SSCMS v7.4.0 enables high-privileged attackers to execute arbitrary SQL statements via the stl:sqlContent tag's queryString attribute. Attackers with administrative access can craft encrypted payloads to the /api/stl/actions/dynamic endpoint, bypassing parameterization controls to achieve database compromise, authentication bypass, or complete data exfiltration. EPSS data not available; no confirmed active exploitation (CISA KEV negative); public exploit code availability unknown but detailed technical advisory published by VulnCheck increases weaponization risk.

Authentication Bypass SQLi Sscms +1
NVD GitHub VulDB
EPSS 0% CVSS 2.3
LOW Monitor

Improper access control in SiteServer SSCMS 7.4.0's Agent Installation Workflow allows remote attackers to bypass security restrictions by manipulating the SecurityKey argument, potentially gaining unauthorized access to protected functionality. The CVSS 4.0 score of 2.3 reflects genuine exploitation difficulty - high attack complexity and required passive user interaction significantly limit opportunistic abuse - though the authentication bypass characterization indicates a security boundary violation is achievable under the right conditions. No patch is available; the project has not responded to responsible disclosure submitted via GitHub issue #3898, and no public exploit has been identified at this time.

Authentication Bypass Sscms Siteserver
NVD VulDB GitHub
EPSS 0% CVSS 2.1
LOW Monitor

Reflected cross-site scripting in SSCMS v7.4.0 allows authenticated attackers to inject arbitrary JavaScript through crafted STL template payloads in the /api/stl/actions/dynamic endpoint. The vulnerability arises from improper output encoding when decrypted STL templates are returned in JSON responses, enabling session hijacking, credential theft via phishing, and unauthorized user actions. User interaction is required to trigger the payload, limiting but not eliminating real-world risk.

XSS Sscms Siteserver
NVD GitHub VulDB
EPSS 3% CVSS 7.2
HIGH POC PATCH This Week

A issue was discovered in SiteServer CMS 6.9.0. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

RCE File Upload Siteserver Cms +1
NVD GitHub

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