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Vulnerability Detail

CVE-2026-121491 Verified Sceawere Triage Sources: NVD / CISA KEV

Vulnerability Metadata

Severity
Critical
Score / CVSS
9
Creation Date
14h ago
Vendor
Unknown
Product
Fiber Admin
Attack Type
CWE-94 Improper Control of Generation of Code ('Code Injection')
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Complexity
HIGH

Narrative and Response

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.

Executive Summary

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Technical Details

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Mitigations

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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References

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Additional Metadata

{
  "score": "9.0",
  "pubDate": "2026-11-07T06:16:58.280Z",
  "pubdate": "2026-11-07T06:16:58.280Z"
}
CVE-2026-121491: CVE-2026-121491 Vulnerability (CRITICAL Severity, CVSS: 9.0) | Sceawere