🛡️ CVE-2026-40500
🟡 CVSS 6.8 — Medium ✅ No Known Exploit CWE-918 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Medium
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CWE CWE-918
Public Exploit ✅ No
Source NVD
Published 2026-04-16
Updated 2026-06-02
Modified 2026-04-16
Fix URL N/A

Affected Packages

Software From version Fixed in
processwire/processwire
unknown

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