Improper access control in October CMS - #VU149491
Published: September 14, 2026
Vulnerability identifier: #VU149491
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the Twig sandbox SecurityPolicy request-object allowlist when processing Safe Mode Twig templates. A remote privileged user can invoke exposed request-object methods to disclose sensitive information.
Exploitation requires CMS markup editing access.
Affected software
October CMS
Remediation
Install security update from vendor's website.
October CMS - addressed in versions 3.7.17, 4.2.21