What’s Vulnerable › Vulnerabilities

CVE-2021-32630: Various

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-20 · updated 2026-06-17
• Weakness: CWE-434

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.

Affected products

• admidio: before 4.0.4 — fixed in 4.0.4

How to fix

Upgrade to a fixed version: admidio 4.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/Admidio/admidio/issues/994
• https://github.com/Admidio/admidio/releases/tag/v4.0.4
• https://github.com/Admidio/admidio/security/advisories/GHSA-xpqj-67r8-25j2
• https://github.com/Admidio/admidio/issues/994
• https://github.com/Admidio/admidio/releases/tag/v4.0.4
• https://github.com/Admidio/admidio/security/advisories/GHSA-xpqj-67r8-25j2

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