Medium severity6.8NVD Advisory· Published Apr 15, 2026· Updated May 1, 2026
CVE-2026-40500
CVE-2026-40500
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
processwire/processwirePackagist | <= 3.0.255 | — |
Affected products
1Patches
Vulnerability mechanics
References
6News mentions
0No linked articles in our index yet.