What is GHSA-qr57-vj96-mp6j?

GHSA-qr57-vj96-mp6j is a security advisory published by GitHub Security Advisories with Critical severity. The Fiber Admin WordPress plugin before 4.0.1 does not validate or escape a request header before...

Which CVE IDs does GHSA-qr57-vj96-mp6j cover?

GHSA-qr57-vj96-mp6j covers the following CVE IDs: CVE-2026-121491. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-qr57-vj96-mp6j?

GHSA-qr57-vj96-mp6j has a CVSS v3 base score of 9.0, published by GitHub Security Advisories.

GHSA-qr57-vj96-mp6jCriticalCVSS 9.0

The Fiber Admin WordPress plugin before 4.0.1 does not validate or escape a request header before...

Vendor

GitHub Security Advisories

Published

November 7, 2026

Last Modified

November 7, 2026

🔗 CVE IDs covered (1)

CVE-2026-121491 →

📋 Description

The Fiber Admin WordPress plugin before 4.0.1 does not validate or escape a request header before writing it into a PHP file it regenerates on an unprotected admin hook, allowing unauthenticated attackers to execute arbitrary code when its custom database error page is enabled and they win a race against an administrator saving its settings.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-121491
https://wpscan.com/vulnerability/42b9773d-9c69-4435-be20-ae86f52b4608
https://github.com/advisories/GHSA-qr57-vj96-mp6j