Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-w62v-q77r-66cc

Alkacon OpenCMS XSS via Mercury template

CVSS 5.4 MediumEPSS 0.018 · 78th percentile

Published by the GitHub Advisory Database at 13 Dec 2023, 12:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.opencms:opencms-coreMaven>=14.0.0, <16.0.016.0.0
Identifiers
GHSA-w62v-q77r-66cc · CVE-2023-6379
Weakness (CWE)
CWE-79
Tags
Published
13 Dec 2023
Updated
20 Jun 2025

Machine-written summary

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

Alkacon OpenCMS (org.opencms:opencms-core) versions 14.0.0 up to 16.0.0 are affected by a cross-site scripting flaw in the Mercury template. A remote attacker can send a victim a crafted JavaScript payload, which may partly let them take control of the victim's browsing session. The source gives few details about the exact trigger. Upgrade to version 16.0.0 or later, which contains the fix.

Written 7 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
5.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CNA (INCIBE)
  • CISA KEV Not listed.
  • EPSS 0.018, the 78th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:10 UTC First seen by agentprime
  2. 31 Oct 2026, 15:10 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.