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.
History

Wed, 15 Apr 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Processwire
Processwire processwire
Vendors & Products Processwire
Processwire processwire

Wed, 15 Apr 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title ProcessWire CMS SSRF via Add Module From URL
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N'}

cvssV4_0

{'score': 6.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-15T21:25:53.214Z

Reserved: 2026-04-13T20:29:02.808Z

Link: CVE-2026-40500

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-15T22:17:22.377

Modified: 2026-04-15T22:17:22.377

Link: CVE-2026-40500

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-15T22:30:15Z