Magento's X-Original-Url header can expose admin url
Date: 2026-02
Affected: composer/openmage/magento-lts
Attack vector: info-disclosure
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-25523
CWE: CWE-200
CVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

### Impact The admin url can be discovered without prior knowledge of it's location by exploiting the X-Original-Url header on some configurations. ### Patches The bug comes from the Zend library and is patche by unsetting the header in the bootstrap process. ### Workarounds Unset the `X-Original-Url` header in the web server configuration. ### References The activation of these headers is coming from the Zend_Controller module. It appears this has been known to some degree since 2016 - https://peterocallaghan.co.uk/2016/12/magento-poisoning-cache/ (dead link now..) ### Credit Anees Hyder ( @anees0xdev ) via HackerOne https://hackerone.com/anees0x_dev/hacktivity


Mitigations:

Architectural layers (MAESTRO):