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

HIGH 7.5CVE-2023-42346 · GHSA-pj6p-9p8x-5mfc · Published 08/05/2026 · updated 28/10/2026

In short

CVE-2023-42346 is a HIGH (CVSS 7.5) vulnerability affecting org.opencms:opencms-core.
Chance of exploitation in the next 30 days (EPSS): 0.23%, higher than 14.1% of all vulnerabilities.
Fix: update to 16.0 or later.

Package	Affected versions	Patched versions
org.opencms:opencms-core Maven	`< 16.0`	`16.0`

Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host.

NVD description

Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host.

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Package

Affected versions

Patched versions

Maven

< 16.0

16.0

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