Vulnerability · Published May 7, 2026 · Assigned by GitHub_M

CVE-2026-41663Admidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Email Send

Low 3.5

In plain English

A low-severity cross-site request forgery in admidio from Admidio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.5Low

Exploit odds (30 days)0.1%top 98.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	admidio/admidio	5.0.9	GHSA-rw74-vc9h-534j

Affected products (as reported)

Vendor	Product	Versions
Admidio	admidio	< 5.0.9

Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:L

References

https://github.com/Admidio/admidio/security/advisories/GHSA-rw74-vc9h-534j x_refsource_CONFIRM
https://github.com/Admidio/admidio/releases/tag/v5.0.9 x_refsource_MISC