VULNERABILITY INTELLIGENCE

CVE-2026-54588

CVSS score9.6 CRITICAL
EPSS probability0.54%
CISA KEVNot currently listed
Published2026-06-23
Last modified2026-06-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

Description

Poweradmin is a web-based DNS administration tool for PowerDNS server. Versions prior to 4.2.4 and 4.3.3 use the attacker-controlled `HTTP_HOST` request header as the authoritative source for building callback URLs in its OIDC, SAML, and logout authentication flows without any validation. An unauthenticated attacker can poison the `redirect_uri` sent to the Identity Provider, causing the IdP to redirect the victim's authorization code to an attacker-controlled server - resulting in full account takeover with no credentials required. Versions 4.2.4 and 4.3.3 patch the issue.

Weakness classification

  • security-advisories@github.com: CWE-20

Primary references