CVE-2020-5295: Local File read vulnerability in OctoberCMS

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 7.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-06-03 · updated 2026-06-17
Weakness: CWE-98

Description

In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, an attacker can exploit this vulnerability to read local files of an October CMS server. The vulnerability is only exploitable by an authenticated backend user with the `cms.manage_assets` permission. Issue has been patched in Build 466 (v1.0.466).

Affected products

octobercms october: from 1.0.319 before 1.0.466 — fixed in 1.0.466

How to fix

Upgrade to a fixed version: octobercms october 1.0.466. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html
http://seclists.org/fulldisclosure/2020/Aug/2
https://github.com/octobercms/october/commit/2b8939cc8b5b6fe81e093fe2c9f883ada4e3c8cc
https://github.com/octobercms/october/security/advisories/GHSA-r23f-c2j5-rx2f
http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html
http://seclists.org/fulldisclosure/2020/Aug/2
https://github.com/octobercms/october/commit/2b8939cc8b5b6fe81e093fe2c9f883ada4e3c8cc
https://github.com/octobercms/october/security/advisories/GHSA-r23f-c2j5-rx2f

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