CVE-2021-41175: Stored XSS in Client Groups Management (Authenticated)

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-10-26 · updated 2026-06-17
Weakness: CWE-79

Description

Pi-hole's Web interface (based on AdminLTE) provides a central location to manage one's Pi-hole and review the statistics generated by FTLDNS. Prior to version 5.8, cross-site scripting is possible when adding a client via the groups-clients management page. This issue was patched in version 5.8.

Affected products

pi-hole web: before 5.8 — fixed in 5.8

How to fix

Upgrade to a fixed version: pi-hole web 5.8. Check the vendor advisory for mitigations.

References

https://github.com/pi-hole/AdminLTE/commit/01191c7a1b8d5032991ed9d88e0db8d3dbec744d
https://github.com/pi-hole/AdminLTE/releases/tag/v5.8
https://github.com/pi-hole/AdminLTE/security/advisories/GHSA-mhr8-7rvg-8r43
https://github.com/pi-hole/AdminLTE/commit/01191c7a1b8d5032991ed9d88e0db8d3dbec744d
https://github.com/pi-hole/AdminLTE/releases/tag/v5.8
https://github.com/pi-hole/AdminLTE/security/advisories/GHSA-mhr8-7rvg-8r43

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