CVE-2021-32630

Admidio is a free, open source user management system for websites of organizations and groups. In Admidio before version 4.0.4, there is an authenticated RCE via .phar file upload. A php web shell can be uploaded via the Documents & Files upload feature. Someone with upload permissions could rename the php shell with a .phar extension, visit the file, triggering the payload for a reverse/bind shell. This can be mitigated by excluding a .phar file extension to be uploaded (like you did with .php .phtml .php5 etc). The vulnerability is patched in version 4.0.4.

• CWE-434

• https://github.com/Admidio/admidio/issues/994Third Party Advisory
• https://github.com/Admidio/admidio/releases/tag/v4.0.4Release Notes, Third Party Advisory
• https://github.com/Admidio/admidio/security/advisories/GHSA-xpqj-67r8-25j2Exploit, Third Party Advisory
• https://github.com/Admidio/admidio/issues/994Third Party Advisory
• https://github.com/Admidio/admidio/releases/tag/v4.0.4Release Notes, Third Party Advisory
• https://github.com/Admidio/admidio/security/advisories/GHSA-xpqj-67r8-25j2Exploit, Third Party Advisory

Published

May 20, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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