What’s Vulnerable › Vulnerabilities
CVE-2026-90977: Clean Login < 1.19 - Unauthenticated CAPTCHA Bypass via Empty Session Comparison
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-18 · updated 2026-09-18
- Weakness: CWE-697
Description
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.
Affected products
- Clean Login: before 1.19 — fixed in 1.19
How to fix
Upgrade to a fixed version: Clean Login 1.19. Check the vendor advisory for mitigations.
References
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