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Advisory record · GHSA-pj6p-9p8x-5mfc

Alkacon OpenCms is vulnerable to XXE when the <!DOCTYPE> refers to an external host

CVSS 7.5 HighEPSS 0.0023 · 14th percentile

Published by the GitHub Advisory Database at 8 May 2026, 06:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.opencms:opencms-coreMaven<16.016.0
Identifiers
GHSA-pj6p-9p8x-5mfc · CVE-2023-42346
Weakness (CWE)
CWE-611
Tags
Published
8 May 2026
Updated
14 May 2026

Machine-written summary

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

Alkacon OpenCms (org.opencms:opencms-core) versions before 16.0 are vulnerable to XML external entity (XXE) injection when a DOCTYPE declaration refers to an external host. The source gives few details about the required access or the resulting impact. Upgrade to version 16.0 or later, which contains the fix.

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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0023, the 14th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 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.