CVE-2026-112951 Details
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.
A stored cross-site scripting (XSS) vulnerability has been identified in ApostropheCMS versions prior to 4.34.0. The issue arises in the color field, which accepts trailing content after a valid 'rgb()' or 'hsl()' prefix. This is due to the TinyColor validation not requiring the entire value to match a color. An authenticated user with edit rights can exploit this by injecting arbitrary HTML after a valid color prefix. When the injected HTML is rendered, it executes the payload, leading to stored XSS.
Users can update to ApostropheCMS version 4.34.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 20, 2026CISA-ADP
Assessed Oct 20, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmgj-9cwm-cf3h | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498 | [email protected] | Source CodeVendor |
| https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea | [email protected] | Source CodeVendor |
| https://github.com/apostrophecms/apostrophe/releases/tag/[email protected] | [email protected] | Release NotesVendor |
| https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmgj-9cwm-cf3h | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ApostropheCMS | < 4.34.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 20, 2026 | CVE Modified | CISA-ADP |
| Oct 20, 2026 | New CVE Received | [email protected] |