# CVE-2026-121612: WPZOOM WPBruiser goodbye-captcha broken authentication

Source: https://junglewise.ai/threats/cve-2026-121612-weak-authentication-vulnerability-in-wpzoom-wpbruiser-no-captcha  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-09. Updated: 2026-11-09  
License: CC BY 4.0 with a link back

CVE-2026-121612 · Severity: medium · CVSS 4.3 · Published 2026-11-09

WPBruiser is a WordPress plugin that provides anti-spam protection using a CAPTCHA system. A weakness in its authentication mechanism allows attackers with a subscriber account to bypass login protections or impersonate other users without knowing their passwords. This could lead to unauthorized access to WordPress accounts and site content.

Vendors: [WPZOOM](https://junglewise.ai/threats/vendors/wpzoom).

## Quick answers

**Is CVE-2026-121612 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121612 being exploited in the wild.

**How severe is CVE-2026-121612?** Medium severity, with a CVSS score of 4.3, published 9 November 2026.

**Which products and versions are affected?** WPZOOM WPBruiser {no-Captcha anti-Spam} through 3.6.2.

**Is there a fix for CVE-2026-121612?** Yes: fixed in 3.6.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121612 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-121612?** Check whether you run WPZOOM WPBruiser {no-Captcha anti-Spam} at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.6.3

## Technical details

The plugin contains a broken authentication vulnerability (CWE-287) that allows attackers with subscriber privileges to bypass the login system or assume the identity of other users. The vulnerability is network-accessible and requires only a valid subscriber account, making it exploitable by authenticated users. A fix is available in version 3.6.3.

## Affected products

- WPZOOM WPBruiser {no-Captcha anti-Spam} through 3.6.2

## Timeline

- 2026-11-09: disclosed
- 2026-11-07: patched

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/goodbye-captcha/vulnerability/wordpress-wpbruiser-no-captcha-anti-spam-plugin-3-6-2-broken-authentication-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/goodbye-captcha/vulnerability/wordpress-wpbruiser-no-captcha-anti-spam-plugin-3-6-2-broken-authentication-vulnerability?_s_id=cve)