October CMS has Stored XSS in Event Log Mail Preview

TRUNG BÌNH 5.4CVE-2026-24907 · GHSA-j4j5-9x6g-rgxc · Công bố 14/04/2026 · cập nhật 26/10/2026

Tóm tắt nhanh

CVE-2026-24907 là lỗ hổng mức TRUNG BÌNH (CVSS 5.4) ảnh hưởng october/system, october (octobercms).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.20%, cao hơn 9.7% các lỗ hổng khác.
Cách xử lý: cập nhật lên 4.1.10, 3.7.14 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
october/system Packagist	`≥ 4.0.0, < 4.1.10< 3.7.14`	`4.1.103.7.14`
october octobercms	`≥ 4.0.0, ≤ 4.1.9≤ 3.7.13`	Chưa có bản vá

Mô tả

A stored cross-site scripting (XSS) vulnerability was identified 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.

Impact

Stored XSS via mail template content rendered in Event Log
Could allow privilege escalation if a superuser views a malicious log entry
Requires authenticated backend access with mail template editing permissions
Requires a superuser to view the specific Event Log entry to trigger

Patches

The vulnerability has been patched in v3.7.14 and v4.1.10. All users are encouraged to upgrade to the latest patched version.

Workarounds

If upgrading immediately is not possible:

Restrict mail template editing permissions to fully trusted administrators only
Restrict Event Log viewing permissions to minimize exposure

References

Reported by Chris Alupului

Mô tả của NVD

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.