CVE-2023-42346: Alkacon OpenCms is vulnerable to XXE when the <!DOCTYPE> refers to an external host

May 8, 2026 (updated May 14, 2026)

Alkacon OpenCms before 16 allows XXE when the refers to an external host.

References

github.com/advisories/GHSA-pj6p-9p8x-5mfc
labs.watchtowr.com/xxe-you-can-depend-on-me-opencms
nvd.nist.gov/vuln/detail/CVE-2023-42346

Code Behaviors & Features

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