CVE-2026-54588

CRITICAL EPSS 22.9%
Published Jun 23, 20261w ago · Modified Jun 24, 20261w ago
9.6 CVSS 3.1
Critical
Find Similar
Published Jun 23, 2026 1w ago
Last Modified Jun 24, 2026 1w ago

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.

CVSS Details

Base Score
9.6
Exploitability
2.8
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability Low

Threat Intelligence

EPSS Exploit Probability
22.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-20 Improper Input Validation Validation
CWE-601

References 3

  • github.com https://github.com/poweradmin/poweradmin/releases/tag/v4.2.4
  • github.com https://github.com/poweradmin/poweradmin/releases/tag/v4.3.3
  • github.com https://github.com/poweradmin/poweradmin/security/advisories/GHSA-3735-5339-xfwx

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.