Authentication Bypass in WP Captcha PRO Plugin for WordPress
CVE-2026-5415

8.8HIGH

Key Information:

Vendor

WordPress
Status
Advanced Google Recaptcha
Vendor
CVE Published:
5 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5415?

The WP Captcha PRO plugin for WordPress is susceptible to an authentication bypass vulnerability present in all versions up to 5.38. This occurs due to inadequate security checks in the ajax_run_tool() AJAX handler, which only verifies a nonce without any capability validation. Furthermore, the create_temporary_link feature allows unauthorized generation of passwordless login links for any user. This vulnerability is exacerbated since the required nonce is exposed to all authenticated users, including those with the Subscriber role, on several admin pages. As a result, authenticated attackers can exploit this weakness to log in as any user, including Administrators, leading to a potential complete account takeover.

Affected Version(s)

Advanced Google reCAPTCHA 0 <= 5.38

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-5415
Created by izxci

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://getwpcaptcha.com

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nguyen Ngoc Duc
.