CVE-2026-76793: CWE-287 Improper Authentication in Firebase Authentication
Description
CVE-2026-76793 is a high-severity vulnerability in the Firebase Authentication WordPress plugin before version 1.7.1. The flaw allows unauthenticated attackers to log in as any user, including administrators, because the plugin does not verify the email address in an authentication token before matching it to a WordPress account and issuing a session.
CVSS v3.1
Score 8.1high
Affected software
Firebase Authentication
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Firebase Authentication WordPress plugin versions prior to 1.7.1 contain an improper authentication vulnerability (CWE-287). Specifically, the plugin fails to verify that the email address in an authentication token is verified before associating it with a WordPress user account and creating a session. This allows unauthenticated attackers to bypass authentication controls and impersonate any user, including administrative accounts. The vulnerability has a CVSS v3.1 score of 8.1, indicating high severity, with impacts on confidentiality, integrity, and availability. A patch is available to address this issue.
Potential Impact
Successful exploitation allows unauthenticated attackers to log in as any user, including administrators, potentially leading to full system compromise, data exposure, and unauthorized administrative actions within the WordPress environment.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade the Firebase Authentication WordPress plugin to version 1.7.1 or later to remediate the issue. Since this is a plugin vulnerability, applying the official update is the recommended and effective mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-19T17:55:46.564Z
- State
- PUBLISHED
- Is Cloud Service
- true
Threat ID: 6a893cc5acd9273b49a6fea8
Added to database: 08/22/2026, 06:08:05 UTC
Last enriched: 09/10/2026, 15:18:40 UTC
Last updated: 10/06/2026, 06:48:20 UTC
Views: 91
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