# WPS Hide Login <= 1.9.19 - Unauthenticated Login Page Protection Bypass via 'action' Parameter

- **ID:** WPSEC-2026-3080
- **Plugin:** WPS Hide Login (`wps-hide-login`), https://wordpress.org/plugins/wps-hide-login/
- **Affected versions:** from 1.5.1 before 1.9.20
- **Fixed in:** 1.9.20 (Update to 1.9.20 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-288
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-13)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wps-hide-login
- **Fix released:** 2026-11-12
- **Published:** 2026-11-13
- **URL:** https://wpsec.com/vuln/WPSEC-2026-3080/

## Description

The WPS Hide Login plugin for WordPress is vulnerable to a login page protection bypass via the 'action' parameter in all versions up to, and including, 1.9.19. This is due to the plugin's password-protected post ('postpass') exemption in its wp_loaded handler. The exemption checked only the query-string 'action' value (and, in versions before 1.7, only that a 'post_password' field was posted), while WordPress's wp-login.php acts on $_REQUEST['action'], where a POSTed value overrides the query string. This makes it possible for unauthenticated attackers to reach the default wp-login.php and its login, lost-password and other actions, which the plugin is configured to hide, and so defeat the hidden login URL (for example, to brute-force credentials).

## References

- https://wpsec.com/vuln/WPSEC-2026-3080/
- https://plugins.svn.wordpress.org/wps-hide-login/tags/1.9.20/
- https://wordpress.org/plugins/wps-hide-login/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-3080/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.