CVE-2023-6379: Alkacon OpenCMS XSS via Mercury template

December 13, 2023 (updated June 20, 2025)

Cross-site scripting (XSS) vulnerability in Alkacon Software Open CMS, affecting versions 14 and 15 of the ‘Mercury’ template. This vulnerability could allow a remote attacker to send a specially crafted JavaScript payload to a victim and partially take control of their browsing session.

References

github.com/advisories/GHSA-w62v-q77r-66cc
github.com/alkacon/opencms-core
github.com/alkacon/opencms-core/commit/d965c18ac6d24ad75bfea272edb8b2efd4290afa
nvd.nist.gov/vuln/detail/CVE-2023-6379
www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacon-software-opencms

Code Behaviors & Features

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