CVE-2026-90977mediumCWE-697

CVE-2026-90977: medium-severity vulnerability in Clean Login

Clean Login < 1.19 - Unauthenticated CAPTCHA Bypass via Empty Session Comparison

Published

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 5.3epss 0.4%
from disclosure to weapon19 days
Published on NVDSep 18
1st PoC+19d
The Clean Login WordPress plugin before 1.19 does not verify its registration CAPTCHA when the stored session value is empty, allowing unauthenticated users to bypass the anti-automation control on the registration form and create accounts without solving it.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Unknown · Clean Login
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Clean Login

In the same product, most dangerous first.

CVE-2022-4838MEDIUMClean Login < 1.13.7 - Contributor+ Stored XSS via ShortcodeEPSS 0.6%CVE-2026-90976MEDIUMClean Login < 1.19 - Unauthenticated Account Creation with Registration DisabledEPSS 0.3%