Poweradmin up to 4.2.3/4.3.2 input validation

Summaryinfo

A vulnerability categorized as critical has been discovered in Poweradmin up to 4.2.3/4.3.2. Affected is an unknown function. Executing a manipulation can lead to input validation. This vulnerability appears as CVE-2026-54588. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Poweradmin up to 4.2.3/4.3.2 and classified as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-54588 since 06/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.2.4 or 4.3.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Poweradmin

Version

• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.3.0
• 4.3.1
• 4.3.2

Website

• Product: https://github.com/poweradmin/poweradmin/

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Once again VulDB remains the best source for vulnerability data.

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