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OpenAdvisories
Medium · 5.1 CVE-2026-2736 EUVD-2026-8334GHSA-9636-r3rx-jw83

Reflected Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms

Published Feb 19, 2026 · Updated Mar 9, 2026 · Assigned by INCIBE

Description

Reflected Cross-site Scripting (XSS) in Alkacon's OpenCms v18.0, which allows an attacker to execute JavaScript code in the victim's browser by sending the victim a malicious URL containing the ‘q’ parameter in ‘/search/index.html’. This vulnerability can be exploited to steal sensitive user information such as session cookies, or to perform actions while impersonating the user.

Affected products

VendorProductAffectedFixed
Alkacon OpenCms 18.0 —

References