CVE-2026-24907CWE-79

October CMS has Stored XSS via Event Log Mail Preview

Medium · published April 14, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
9.1
In the wild
Unconfirmed
What it is

October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a stored cross-site scripting (XSS) vulnerability in the Event Log mail preview feature. When viewing logged mail messages, HTML content was rendered in an iframe without proper sandboxing, allowing JavaScript execution in the viewer's browser context. This issue has been fixed in versions 3.7.14 and 4.1.10. If users are unable to update immediately, workarounds include restricting mail template editing permissions to fully trusted administrators only and restricting Event Log viewing permissions to minimize exposure.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00198 · 9.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-14T17:34Z
EPSS history
Timeline
  • 14 APR 17:34Z
    October CMS has Stored XSS via Event Log Mail Preview
    cvelistv5