CVE-2021-32706

Pi-hole's Web interface provides a central location to manage a Pi-hole instance and review performance statistics. Prior to Pi-hole Web interface version 5.5.1, the `validDomainWildcard` preg_match filter allows a malicious character through that can be used to execute code, list directories, and overwrite sensitive files. The issue lies in the fact that one of the periods is not escaped, allowing any character to be used in its place. A patch for this vulnerability was released in version 5.5.1.

• CWE-94

• https://github.com/pi-hole/AdminLTE/releases/tag/v5.5.1Release Notes, Third Party Advisory
• https://github.com/pi-hole/AdminLTE/security/advisories/GHSA-5cm9-6p3m-v259Exploit, Third Party Advisory
• https://github.com/pi-hole/AdminLTE/releases/tag/v5.5.1Release Notes, Third Party Advisory
• https://github.com/pi-hole/AdminLTE/security/advisories/GHSA-5cm9-6p3m-v259Exploit, Third Party Advisory

Published

Aug 4, 2021

Last Modified

Jun 17, 2026

Status

Modified

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