#VU125890 Stored cross-site scripting in October CMS - CVE-2026-24906
Published: April 14, 2026
Vulnerability identifier: #VU125890
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-24906
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
October CMS
October CMS
Software vendor:
OctoberCMS
OctoberCMS
Description
The vulnerability allows a remote user to execute arbitrary script in a victim's browser.
The vulnerability exists due to improper neutralization of input during web page generation in the backend editor markup classes fields when rendering stored markup class values in RichEditor dropdown menus. A remote user can inject a malicious markup class value to execute arbitrary script in a victim's browser.
Exploitation requires authenticated backend access with editor settings permissions and is triggered when a user opens a RichEditor.
Remediation
Install security update from vendor's website.