CVE-2026-7429

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

State: Published
Severity: 2.1 Low
Published: Apr 30, 2026
Updated: Jul 28, 2026
Reserved: Apr 29, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	2.1 Low	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	VulnCheck
3.1	4.6 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
SSCMSsiteserver	7.4.0Affected

References

https://github.com/siteserver/cms/issues/3892issue-tracking
https://github.com/siteserver/cmsproduct
https://www.vulncheck.com/advisories/sscms-reflected-cross-site-scripting-via-stl-processingthird-party-advisory

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