Stored Cross-Site Scripting (XSS) vulnerability in Alkacon’s OpenCms_CVE-2026-2735

5.1 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-2735

Source INCIBE

Published Feb 19, 2026 at 08:38

Affected Product

Vendor Alkacon

Product OpenCms

Version 18.0

Affected Versions Alkacon OpenCms 18.0

CWE Classification

CWE-79

References

www.incibe.es /en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms

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    "published": "2026-02-19T08:38:31.071Z",
    "modified": "2026-02-19T08:38:31.071Z",
    "type": "cve",
    "title": "Stored Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms",
    "source": "INCIBE",
    "references": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms",
    "id": "CVE-2026-2735",
    "bulletinFamily": "",
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    "sourceData": "Alkacon OpenCms 18.0",
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    "cvss": {
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        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
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        "privilegesRequired": "",
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        "cvssV3": {
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    "href": "",
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    "product": "OpenCms",
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