Admidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Email Send

Description

Admidio is an open-source user management solution. Prior to version 5.0.9, several administrative operations in Admidio's preferences module (database backup, test email, htaccess generation) fire via GET requests with no CSRF token validation. Because SameSite=Lax cookies travel with top-level GET navigations, an attacker forces an authenticated admin to trigger these actions from a malicious page. This issue has been patched in version 5.0.9.

Scores

EPSS (exploitation in 30 days)

0.12% · top 98% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.5.

Weakness

• CWE-352: Cross-Site Request Forgery (CSRF) (opens in a new tab)All about CWE-352 and its CVEs

Affected products

• Admidio · admidio

  • affected < 5.0.9

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Packagistadmidio/admidioGHSA-rw74-vc9h-534j (opens in a new tab)

References (2)

• https://github.com/Admidio/admidio/security/advisories/GHSA-rw74-vc9h-534j (opens in a new tab)x_refsource_CONFIRMexploit
• https://github.com/Admidio/admidio/releases/tag/v5.0.9 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-rw74-vc9h-534j (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-41663](https://trackcve.app/badge/CVE-2026-41663.svg)](https://trackcve.app/cve/CVE-2026-41663)

Record last updated 7 May 2026, 12:41 UTC.