CVE-2026-7429

SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing

Published Apr 30, 2026 CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
Description
SSCMS v7.4.0 contains a reflected cross-site scripting vulnerability in the STL processing endpoint that allows attackers to execute arbitrary JavaScript by crafting malicious STL template payloads that are decrypted and returned without proper sanitization. Attackers can exploit improper output encoding in the /api/stl/actions/dynamic endpoint to inject executable JavaScript into JSON responses, leading to session hijacking, phishing attacks, and unauthorized actions performed on behalf of users.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Sscms
Sscms sscms
CPEs cpe:2.3:a:sscms:sscms:7.4.0:*:*:*:*:*:*:*
Vendors & Products Sscms
Sscms sscms
Type Values Removed Values Added
First Time appeared Siteserver
Siteserver sscms
Vendors & Products Siteserver
Siteserver sscms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description SSCMS v7.4.0 contains a reflected cross-site scripting vulnerability in the STL processing endpoint that allows attackers to execute arbitrary JavaScript by crafting malicious STL template payloads that are decrypted and returned without proper sanitization. Attackers can exploit improper output encoding in the /api/stl/actions/dynamic endpoint to inject executable JavaScript into JSON responses, leading to session hijacking, phishing attacks, and unauthorized actions performed on behalf of users.
Title SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Jul 28, 2026, 1:50 AM
Reserved
Apr 29, 2026, 3:02 PM
Status
Deferred
Published
Apr 30, 2026, 8:16 PM
Modified
Oct 26, 2026, 12:10 AM