CVE-2026-75903: CWE-287 Improper Authentication in manuelgalan Vulnity Security
Description
The Vulnity Security plugin for WordPress has an authentication bypass vulnerability in all versions up to and including 1.4.3. This flaw arises from improper protection of a delegated-login credential file on Nginx servers, where the plugin's server configuration snippet protects the wrong directory. Exploiting this, unauthenticated attackers can retrieve stored credentials, forge signed REST API requests, and gain administrator access.
CVSS v3.1
Score 8.1high
Affected software
manuelgalan
Vulnity Security
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-75903 is an authentication bypass vulnerability (CWE-287) in the Vulnity Security WordPress plugin (versions up to 1.4.3). The vulnerability is due to insufficient protection of the delegated-login pairing credential file on Nginx-based installations. The plugin's generated server configuration snippet incorrectly guards the wrong directory path, allowing unauthenticated attackers to access stored credentials. With these credentials, attackers can forge signed REST API requests and log in as administrators.
Potential Impact
An attacker can bypass authentication controls without any privileges or user interaction, gaining administrator-level access to the WordPress site. This compromises confidentiality, integrity, and availability, allowing full control over the affected site.
Mitigation Recommendations
No patch or official fix is currently documented. Users should monitor the vendor advisory for updates. Until a fix is available, consider restricting access to the delegated-login credential file via manual server configuration adjustments or temporarily disabling the plugin on Nginx servers to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-08-18T14:52:02.550Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad1da7e2cdf04f656d16782
Added to database: 10/16/2026, 08:04:14 UTC
Last enriched: 10/16/2026, 08:18:21 UTC
Last updated: 10/16/2026, 08:18:21 UTC
Views: 4
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