CVE-2026-2735 MEDIUM

CVE-2026-2735: Stored Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms

Vendor Alkacon
Product OpenCms
Weakness CWE-79 · XSS
Published February 19, 2026
Last update February 20, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 19, 2026 CVE published
February 20, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2023-0810 Cross-site Scripting (XSS) - Stored in btcpayserver/btcpayserver CVE-2026-24975 WordPress Organici Library plugin <= 2.1.2 - Reflected Cross Site Scripting (XSS) vulnerability CVE-2025-53237 WordPress WP Wizard Cloak Plugin <= 1.0.1 - Cross Site Scripting (XSS) Vulnerability CVE-2024-1377 Happy Addons for Elementor <= 3.10.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Author Meta Widget CVE-2025-6676 Simple XML sitemap - Moderately critical - Cross-site Scripting - SA-CONTRIB-2025-083