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Advisory record · GHSA-gmwr-9j4p-96vm

ProcessWire: server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature

CVSS 6.8 Medium

Published by the GitHub Advisory Database at 16 Apr 2026, 00:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
processwire/processwirePackagist<=3.0.255No fixed version yet
Identifiers
GHSA-gmwr-9j4p-96vm · CVE-2026-40500 · PKSA-m19p-x1h4-xw57
Weakness (CWE)
CWE-918
Tags
Published
16 Apr 2026
Updated
16 Apr 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

ProcessWire versions 3.0.255 and earlier (processwire/processwire) contain a server-side request forgery flaw in the admin panel's 'Add Module From URL' feature. An authenticated administrator can supply arbitrary URLs, causing the server to send outbound requests to internal or external hosts, and differing error messages can be used to scan internal ports and enumerate hosts. No fixed version is listed.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.