Vulnerability Description
Masa CMS is an open source Enterprise Content Management platform. Versions 7.2.8 and below, 7.3.1 through 7.3.13, 7.4.0-alpha.1 through 7.4.8 and 7.5.0 through 7.5.1 are vulnerable to XSS when an unsanitized value of the ajax URL query parameter is directly included within the <head> section of the HTML page. An attacker can execute arbitrary scripts in the context of the user's session, potentially leading to Session Hijacking, Data Theft, Defacement and Malware Distribution. This issue is fixed in versions 7.5.2, 7.4.9, 7.3.14, and 7.2.9. To work around this issue, configure a Web Application Firewall (WAF) rule (e.g., ModSecurity) to block requests containing common XSS payload characters in the ajax query parameter. Alternatively, implement server-side sanitization using middleware to strip or escape dangerous characters from the ajax parameter before it reaches the vulnerable rendering logic.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Masacms | Masacms | < 7.2.9 |
Related Weaknesses (CWE)
References
- https://github.com/MasaCMS/MasaCMS/commit/376c27196b1e2489888b7a000cdf5c45bb8595Patch
- https://github.com/MasaCMS/MasaCMS/security/advisories/GHSA-249c-vqwv-43vcPatchVendor Advisory
FAQ
What is CVE-2025-66492?
CVE-2025-66492 is a vulnerability with a CVSS score of 8.2 (HIGH). Masa CMS is an open source Enterprise Content Management platform. Versions 7.2.8 and below, 7.3.1 through 7.3.13, 7.4.0-alpha.1 through 7.4.8 and 7.5.0 through 7.5.1 are vulnerable to XSS when an uns...
How severe is CVE-2025-66492?
CVE-2025-66492 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66492?
Check the references section above for vendor advisories and patch information. Affected products include: Masacms Masacms.