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TI-2025-36756 Aliases CVE-2025-59151

Pi-hole Admin Interface vulnerable to HTTP response header injection via CRLF injection

Priority HIGH 69CWE-113Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00436 38th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed web (pi-hole): 6.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Pi-holewebbefore 6.36.3Patch availableCNA
  • web VendorPi-hole Affected before 6.3 Fixed in 6.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*before 6.3VulnerablePi-hole
  • cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:* Versions before 6.3 Vulnerable ·Pi-hole

Remediation

  • Fix · CNA web (pi-hole) Fixed in 6.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-59151

References

Exploit 1

  • TI-2023-09443 Improper session handling of "Remember me for 7 days" functionality CVSS 3.1HIGH 8.8
  • TI-2026-25803 Pi-hole has a Stored HTML attribute injection CVSS 3.1MEDIUM 6.1
  • TI-2026-25801 Pi-hole has a Stored XSS / HTML injection in the Network page/Dashboard CVSS 3.1MEDIUM 6.1
  • TI-2026-25800 Pi-hole has a Reflected XSS / HTML injection in taillog.js CVSS 3.1MEDIUM 6.1
  • TI-2025-33477 Pi-hole Admin Interface vulnerable to cross-site scripting via malformed URL path on 404 error page CVSS 4.0MEDIUM 5.1
  • TI-2026-25802 Pi-hole has a Stored HTML Injection in queries.js CVSS 3.1MEDIUM 4.8
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences