Alkacon OpenCMS XSS via Mercury template
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.opencms:opencms-core | >= 14.0.0, < 16.0.0 | 16.0.0 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Java / Kotlin (Maven)
- Package
org.opencms:opencms-core- Disclosed
- 13.12.2023
- Updated
- 11.10.2026 12:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-w62v-q77r-66cc - CC BY 4.0
Vulnerability history: org.opencms:opencms-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 31
- First → latest
- 11.2019 05.2026
- Without a fix
- 4
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 17
- Low 11
Disclosures per year
- 2019: 4
- 2020: 0
- 2021: 1
- 2022: 15
- 2023: 3
- 2024: 1
- 2025: 3
- 2026: 4
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