Vulnerability Description
ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, the color field accepts trailing content after a valid rgb() or hsl() prefix because its TinyColor validation does not require the entire value to match a color. An authenticated user with edit rights can store arbitrary HTML after a valid color prefix. When the stored value is rendered, the payload executes, resulting in stored XSS. This issue is fixed in version 4.34.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e5
- https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce76686
- https://github.com/apostrophecms/apostrophe/releases/tag/[email protected]
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmgj-9cwm-c
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmgj-9cwm-c
FAQ
What is CVE-2026-112951?
CVE-2026-112951 is a vulnerability with a CVSS score of 5.4 (MEDIUM). ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, the color field accepts trailing content after a valid rgb() or hsl() prefix because its TinyColor validation does n...
How severe is CVE-2026-112951?
CVE-2026-112951 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-112951?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.