CVE-2026-121491
Received Received - Intake

Arbitrary Code Execution in Fiber Admin WordPress Plugin

Publication date: 2026-11-07

Last updated on: 2026-11-07

Assigner: WPScan

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.

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Meta Information

Published
2026-11-07
Last Modified
2026-11-07
Generated
2026-11-07
EPSS Evaluated
N/A
NVD
CVE-2026-121491
EUVD
EUVD-2026-118943

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Unknown Fiber Admin From 3.1.0 (inc) to 4.0.1 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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