Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level advertisement and internet tracker blocking application. Pi-hole Admin Interface before 6.3 is vulnerable to Carriage Return Line Feed (CRLF) injection. When a request is made to a file ending with the .lp extension, the application performs a redirect without properly sanitizing the input. An attacker can inject carriage return and line feed characters (%0d%0a) to manipulate both the headers and the content of the HTTP response. This enables the injection of arbitrary HTTP response headers, potentially leading to session fixation, cache poisoning, and the weakening or bypassing of browser-based security mechanisms such as Content Security Policy or X-XSS-Protection. This vulnerability is fixed in 6.3.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/pi-hole/web/security/advisories/GHSA-5v79-p56f-x7c4 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.2 · pi-holeNVD modified 2026-10-08 11:10
Affected (CPE criteria) 1
cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*
References 1
- https://github.com/pi-hole/web/security/advisories/GHSA-5v79-p56f-x7c4 Exploit, Vendor Advisory