Authentication bypass in Vulnity Security WordPress plugin
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
The Vulnity Security plugin for WordPress is affected by an authentication bypass in all versions up to and including 1.4.3. On Nginx-based installations, the plugin's generated server configuration snippet guards the wrong directory, which leaves the delegated-login pairing credential file exposed (CWE-287). An unauthenticated remote attacker can retrieve the stored credentials, forge signed REST API requests and log in as an administrator.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
The Vulnity Security plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 1.4.3 This is due to insufficient protection of the delegated-login pairing credential file on Nginx-based installations, where the plugin's generated server configuration snippet guards the wrong directory path. This makes it possible for unauthenticated attackers to retrieve the stored credentials, forge signed REST API requests, and log in as an administrator.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| manuelgalan | Vulnity Security | up to 1.4.3 | — | No fix listed | CNA |
- Vulnity Security Vendormanuelgalan Affected up to 1.4.3 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Vulnity Security.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-75903
- 2026-10-16 Alias added: GHSA-cpp4-39xq-w89m
References
Other 3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5574a52f-cec8-4f79-a3a7-5c13272e5e17?source=cve
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3719373%40vulnity%2Ftags%2F1.4.4&old=3717813%40vulnity%2Ftags%2F1.4.3
- https://plugins.trac.wordpress.org/changeset/3719370/vulnity/trunk/includes/class-static-security.php
Sources
- CVE-2026-75903 · CVE Program
- CVE-2026-75903 · NVD
- FIRST EPSS
- GHSA-cpp4-39xq-w89m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences