CVE-2026-41660 — admidio/admidio
HIGHCVE-2026-41660 is a high-severity (CVSS 7.1) CWE-863 vulnerability in admidio/admidio. A fix is available for admidio/admidio — see the affected versions and patch details below.
Admidio: Inverted 2FA Reset Authorization Check Lets Group Leaders Strip Admin TOTP
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-41660.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2026-41660 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,156 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
admidio/admidioReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Summary
A logic error in Admidio's two-factor authentication reset inverts the authorization check. Non-admin users cannot remove their own TOTP configuration, but they can remove other users' TOTP, including administrators. A group leader with profile edit rights on an admin account can strip that admin's 2FA.
Details
In modules/profile/two_factor_authentication.php at line 84, the authorization check uses an inverted condition:
// modules/profile/two_factor_authentication.php line 84
if (!($gCurrentUser->isAdministrator() || $gCurrentUserId !== $userId))
{
throw new AdmException('SYS_NO_RIGHTS');
}
By De Morgan's law, this condition evaluates as:
- Blocks when:
NOT isAdministrator() AND $gCurrentUserId === $userId - In practice: blocks non-admins from resetting their OWN 2FA
- Passes: non-admins resetting OTHER users' 2FA (the opposite of the intended behavior)
The intended logic should block non-admins from resetting other users' 2FA. The !== operator on line 84 should be ===.
A group leader who holds hasRightEditProfile() permission on an admin user (checked earlier in the flow) can exploit this to strip 2FA from administrator accounts, reducing their security to password-only authentication.
Proof of Concept
- As
testuser(a non-admin group leader with edit rights on admin profiles), send:
POST /adm_program/modules/profile/two_factor_authentication.php HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Cookie: ADMIDIO_..._SESSION_ID=<testuser_session>
mode=reset&user_uuid=<admin_user_uuid>
Result: the server removes 2FA from the admin account.
- As
testuser, attempt to reset their own 2FA:
POST /adm_program/modules/profile/two_factor_authentication.php HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Cookie: ADMIDIO_..._SESSION_ID=<testuser_session>
mode=reset&user_uuid=<testuser_user_uuid>
Result: SYS_NO_RIGHTS error. The user cannot reset their own 2FA.
This confirms the authorization logic is inverted.
Impact
A group leader (or any user with profile edit rights on an admin) can disable two-factor authentication on administrator accounts. This degrades admin account security to password-only, opening the door to credential stuffing or brute force attacks without a 2FA barrier.
Recommended Fix
Change !== to === on line 84 of modules/profile/two_factor_authentication.php:
// Fixed condition: block non-admins from resetting OTHER users' 2FA
if (!($gCurrentUser->isAdministrator() || $gCurrentUserId === $userId))
{
throw new AdmException('SYS_NO_RIGHTS');
}
Found by aisafe.io
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | admidio/admidio | all versions | 5.0.9composer require admidio/admidio:^5.0.9 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for admidio/admidio, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update admidio/admidio to 5.0.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41660 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-41660 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-41660. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-41660 in your dependencies?
O3 Security finds CVE-2026-41660 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.