GitHub Advisoryadvisory · Packagist

GHSA-gmwr-9j4p-96vm ProcessWire: server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature

MEDIUM Published 2026-04-16 Modified 2026-04-16 Official page ↗
Aliases
CVE-2026-40500
Ecosystem
Packagist
Packages
processwire/processwire
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Weaknesses
CWE-918
Reviewed
2026-04-16

Affected packages

• Packagist processwire/processwire: <= 3.0.255 (no fix yet)

Description

ProcessWire CMS version 3.0.255 and prior contain a server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature that allows authenticated administrators to supply arbitrary URLs to the module download parameter, causing the server to issue outbound HTTP requests to attacker-controlled internal or external hosts. Attackers can exploit differentiable error messages returned by the server to perform reliable internal network port scanning, host enumeration across RFC-1918 ranges, and potential access to cloud instance metadata endpoints.

Related

Alias · not in database (1)

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References