Summary
Ein Angreifer kann mehrere Schwachstellen in Webmin ausnutzen, um falsche Informationen darzustellen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.
Product
Webmin ist eine modulare Webanwendung zur Administration eines Unix-basierenden Systems und zur Konfiguration einzelner Dienste.
Vulnerabilities 3
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High 8.1
Webmin HTTP header authentication bypass
The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. A remote attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.202.
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Medium 5.3
Webmin information disclosure via regex pattern
Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories, due to a bypassable regex pattern.
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Medium 5.3
Webmin MFA bypass
Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.
Revision history
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#1
Initiale Fassung
References
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GitHub Security Advisory GHSA-23XJ-GFH3-WF2H vom 2026-06-18
https://github.com/advisories/GHSA-23XJ-GFH3-WF2H
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GitHub Security Advisory GHSA-xpvh-gv3p-w5qx vom 2026-06-18
https://github.com/advisories/GHSA-xpvh-gv3p-w5qx
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GitHub Security Advisory GHSA-9848-6qgw-2748 vom 2026-06-18
https://github.com/advisories/GHSA-9848-6qgw-2748