CVE-2025-34087: pi-hole llc web OS Command Injection

Vulnerability summary

CVE-2025-34087 is a critical (CVSS 9.0) OS Command Injection vulnerability in pi-hole llc web. EPSS estimates a 6.88% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities. 3 public exploits are recorded.

Timeline

1. 03-07-2025
   PublishedVulnerability first disclosed.
2. 15-05-2026
   Last modifiedVulnerability information updated.

Description

An authenticated command injection vulnerability exists in Pi-hole versions up to 3.3. When adding a domain to the allowlist via the web interface, the domain parameter is not properly sanitized, allowing an attacker to append OS commands to the domain string. These commands are executed on the underlying operating system with the privileges of the Pi-hole service user. This behavior was present in the legacy AdminLTE interface and has since been patched in later versions.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.