CVE-2026-2735

MEDIUM

OpenCms 18.0 - Stored Cross-Site Scripting via Blog Article Text Parameter

Title source: llm

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.

References (1)

Core 1

Core References

Third Party Advisory patch

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

Scores

CVSS v3 5.4

EPSS 0.0018

EPSS Percentile 7.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (1)

alkacon/opencms 18.0.0

Published Feb 19, 2026

Tracked Since Feb 19, 2026