CVE-2026-24907

MEDIUM

October CMS has Stored XSS via Event Log Mail Preview

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.4
EPSS 0.0020
EPSS Percentile 9.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (4)
october/system 4.0.0 - 4.1.10Packagist
octobercms/october < 3.7.13
octobercms/october < 3.7.14
octobercms/october >= 4.0.0, < 4.1.10
Published Apr 14, 2026
Tracked Since Apr 14, 2026