Raw vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:NCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-34384 is a medium-severity CSRF (CWE-352) vulnerability in Admidio Admidio. Its CVSS base score is 4.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and SC-23 (Session Authenticity) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-34384 is a Cross-Site Request Forgery (CSRF) vulnerability, mapped to CWE-352, in Admidio, an open-source user management solution. Versions prior to 5.0.8 are affected, specifically the create_user, assign_member, and assign_user action modes in modules/registration.php. These modes approve pending user registrations through GET requests that read parameters from $_GET and execute irreversible state changes without CSRF token validation, unlike the delete_user mode in the same file which properly checks the token.
An attacker who submits a pending registration can extract their user UUID from the registration confirmation email URL and craft a malicious URL. By tricking any authenticated user with the rol_approve_users permission into visiting this URL, the attacker bypasses the manual registration approval workflow, resulting in automatic approval of their account. The CVSS v3.1 base score is 4.5 (AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N), reflecting network accessibility, low attack complexity, requirement for high privileges and user interaction, and high integrity impact with no confidentiality or availability effects.
Admidio has patched this issue in version 5.0.8. Security practitioners should upgrade to this version or later. Additional details are available in the GitHub security advisory at https://github.com/Admidio/admidio/security/advisories/GHSA-ph84-r98x-2j22 and the patch commit at https://github.com/Admidio/admidio/commit/707171c188b3e8f36007fc3f2bccbfac896ed019.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-17628
Vulnerability Data
Admidio is an open-source user management solution. Prior to version 5.0.8, the create_user, assign_member, and assign_user action modes in modules/registration.php approve pending user registrations via GET request without validating a CSRF token. Unlike the delete_user mode in the same file…
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(which correctly validates the token), these three approval actions read their parameters from $_GET and perform irreversible state changes without any protection. An attacker who has submitted a pending registration can extract their own user UUID from the registration confirmation email URL, then trick any user with the rol_approve_users right into visiting a crafted URL that automatically approves the registration. This bypasses the manual registration approval workflow entirely. This issue has been patched in version 5.0.8.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V3.3.2V3.5.1V10.2.1
Mitigating Controls (NIST 800-53 r5) AI
Access enforcement requires verifying that state-changing requests originate from the authenticated user rather than a forged cross-site source.
Protecting session authenticity prevents attackers from replaying or forging authenticated requests via the victim's browser.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require anti-CSRF controls such as tokens or SameSite attributes.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
By denying access to phishing or malicious sites, the control lowers the likelihood that a user will be tricked into submitting a forged request that performs an unintended action on another site.