Information Exposure Through an Error Message in magento-lts - #VU158639
Published: November 2, 2026
Vulnerability identifier: #VU158639
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-209
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to disclose absolute server paths through error pages.
The vulnerability exists due to incomplete error handling in Mage_Adminhtml_Cms_WysiwygController::directiveAction() when filtering template directives on PHP 8, because the handler catches only Exception and allows Error, ValueError, and TypeError to reach the error page. A remote privileged user can submit directives that trigger these errors with CMS access to expose stack traces that may contain absolute server paths.
Affected software
magento-lts
Remediation
Install security update from vendor's website.
magento-lts - addressed in versions 20.18.2, 20.19.0, 21.0.0 beta3