CVE-2026-40500

MEDIUM

6.8

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.

CVE Details

CVSS v3.1 Score6.8

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published4/15/2026

Last Modified4/15/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-918

References

https://gist.github.com/thepiyushkumarshukla/7514e5eed526fd9d20fcfc42ce8d0a82(disclosure@vulncheck.com)

https://processwire.com/(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/processwire-cms-ssrf-via-add-module-from-url(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.