What’s Vulnerable › Vulnerabilities

CVE-2026-54588: Poweradmin has Host Header Injection in OIDC redirect_uri, SAML ACS/SLO URL, and Logout Redirect Construction.

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-06-25
• Weakness: CWE-20

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.

Affected products

• poweradmin: before 4.2.4; from 4.3.0, < 4.3.3

References

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

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