Wednesday, Mar 15th, 2023
Advisory ID: 
Security risk: 
Moderately Critical
Access bypass
Versions affected: 
  • Backdrop Core 1.24.x versions prior to 1.24.1
  • Backdrop Core 1.23.x versions prior to 1.23.2

Backdrop versions 1.22 and prior do not receive security coverage.


Backdrop provides a page that outputs information from phpinfo() to assist with diagnosing issues with PHP configuration.

If an attacker was able to achieve an XSS exploit against a privileged user, they may be able to use this page to access sensitive information that could be used to escalate the attack.

This vulnerability is mitigated by the fact that a successful XSS exploit is also required in order to exploit this vulnerability.


Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.24.1 release page. See the update instructions, if needed.

Reported By: 
Fixed By: 

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