CVE-2021-29449: pi-hole Improper Privilege Management

Vulnerability summary

CVE-2021-29449 is a high (CVSS 7.8) Improper Privilege Management vulnerability in pi-hole. EPSS estimates a 1.85% chance of exploitation in the next 30 days, higher than 78.8% of scored vulnerabilities. 4 public exploits are recorded.

Timeline

1. 14-04-2021
   PublishedVulnerability first disclosed.
2. 06-04-2026
   Last modifiedVulnerability information updated.

Description

Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. Multiple privilege escalation vulnerabilities were discovered in version 5.2.4 of Pi-hole core. See the referenced GitHub security advisory for details.

• CWE-269Improper Privilege ManagementThe product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
• 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.