CVE-2026-7429

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.

CVSS v3 4.6 MEDIUM

4.6^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/siteserver/cms
https://github.com/siteserver/cms/issues/3892
https://www.vulncheck.com/advisories/sscms-reflected-cross-site-scripting-via-stl-processing
https://github.com/siteserver/cms/issues/3892

Configurations

No configuration.

History

30 Apr 2026, 21:16

Type	Values Removed	Values Added
References	~~() https://github.com/siteserver/cms/issues/3892 -~~	() https://github.com/siteserver/cms/issues/3892 -

30 Apr 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-30 20:16

Updated : 2026-05-01 15:28

NVD link : CVE-2026-7429

Mitre link : CVE-2026-7429

CVE.ORG link : CVE-2026-7429

JSON object : View

Products Affected

No product.

CWE

CWE-79

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

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