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Description

Stored Cross-Site Scripting (XSS) in Alkacon's OpenCms v18.0, which occurs when user input is not properly validated when sending a POST request to ‘/blog/new-article/org.opencms.ugc.CmsUgcEditService.gwt’ using the ‘text’ parameter.

PUBLISHED Reserved 2026-02-19 | Published 2026-02-19 | Updated 2026-02-20 | Assigner INCIBE




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Product status

Default status
unaffected

18.0
affected

Credits

Gonzalo Aguilar García (6h4ack) finder

References

www.incibe.es/...o/multiple-vulnerabilities-alkacons-opencms patch

cve.org (CVE-2026-2735)

nvd.nist.gov (CVE-2026-2735)

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