CVE-2026-2736
MEDIUMOpenCms 18.0 - Reflected Cross-Site Scripting via Search Query Parameter
Title source: llmDescription
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.
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
6.1
EPSS
0.0015
EPSS Percentile
4.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/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