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Advisory record · GHSA-vhfp-9wvj-gwvg

XML External Entity vulnerability in MODX CMS

CVSS 9.1 CriticalCriticalEPSS 0.024 · 84th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 1 Nov 2021, 19:19 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
modx/revolutionPackagist<2.8.02.8.0
Identifiers
GHSA-vhfp-9wvj-gwvg · BIT-modx-2020-25911 · CVE-2020-25911 · PKSA-bqwv-kpq3-qmj9
Weakness (CWE)
CWE-611
Tags
Published
1 Nov 2021
Updated
6 Dec 2023

Machine-written summary

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

MODX CMS (modx/revolution) versions before 2.8.0 are affected by an XML External Entity (XXE) vulnerability in the modRestServiceRequest component. The source gives few details on the attack conditions, but an XXE flaw of this kind can allow information disclosure or denial of service. Upgrade modx/revolution to version 2.8.0 or later.

Written 5 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
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.024, the 84th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:32 UTC First seen by agentprime
  2. 31 Oct 2026, 14:32 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.