Open Redirect in Poweradmin
CVE-2026-54588
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.005 (44.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L.
Affected products
- Poweradmin — versions < 4.2.4, >= 4.3.0, < 4.3.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-54588?
- CVE-2026-54588 is a critical-severity vulnerability in Poweradmin, classified under Improper Input Validation. CVSS score: 9.6/10. Published 2026-06-23.
- How severe is CVE-2026-54588?
- Critical severity. CVSS v3 base score is 9.6 out of 10.