Clean Login <= 1.111 - Unauthenticated Authentication Bypass via Reusable Password Restore Link
- ID
- WPSEC-2026-2041
- Plugin
- Clean Login (clean-login)
- Affected
- all versions before 2.0
- Remediation
- Update to 2.0 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-640
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-30
- Attack surface
- Clean Login on WPSec AttackSurface
- Fix released
- Published
Description
The Clean Login plugin for WordPress is vulnerable to Authentication Bypass via the password restore link in all versions up to, and including, 1.111, due to a weak password recovery mechanism. The restore link was protected only by a WordPress nonce whose action was the bare user ID and which was created for a logged-out visitor, instead of a single-use password reset key. The link was not invalidated after use and stayed valid for 12-24 hours, and opening it logged the visitor in as the target user. This makes it possible for unauthenticated attackers who obtain a leaked or previously used restore link to log in as that user, including administrators, and take over the account.
References
- https://wpsec.com/vuln/WPSEC-2026-2041/
- https://plugins.svn.wordpress.org/clean-login/tags/2.0/
- https://wordpress.org/plugins/clean-login/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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