SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing_CVE-2026-7429

2.1 / 10

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

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.

Basic Information

ID CVE-2026-7429

Source VulnCheck

Published Apr 30, 2026 at 19:45

Modified Apr 30, 2026 at 19:46

Affected Product

Vendor siteserver

Product SSCMS

Version 7.4.0

Affected Versions siteserver SSCMS 7.4.0

CWE Classification

CWE-79

References

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    "published": "2026-04-30T19:45:03.364Z",
    "modified": "2026-04-30T19:46:09.053Z",
    "type": "cve",
    "title": "SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing",
    "source": "VulnCheck",
    "references": "https://github.com/siteserver/cms/issues/3892\nhttps://github.com/siteserver/cms\nhttps://www.vulncheck.com/advisories/sscms-reflected-cross-site-scripting-via-stl-processing",
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