Description
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.
References (3)
Core 3
Core References
Exploit, Third Party Advisory x_refsource_confirm
https://github.com/Admidio/admidio/security/advisories/GHSA-xpqj-67r8-25j2
Third Party Advisory x_refsource_misc
https://github.com/Admidio/admidio/issues/994
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/Admidio/admidio/releases/tag/v4.0.4
Scores
CVSS v3
9.6
EPSS
0.0084
EPSS Percentile
74.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Details
CWE
CWE-434
Status
published
Products (1)
admidio/admidio
< 4.0.4
Published
May 20, 2021
Tracked Since
Feb 18, 2026