CVE-2026-2735 — MEDIUM (5.4)

Vulnerability 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.

CVSS Score

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Alkacon	Opencms	18.0.0

Related Weaknesses (CWE)

CWE-79

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkaThird Party Advisory

FAQ

What is CVE-2026-2735?

CVE-2026-2735 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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...

How severe is CVE-2026-2735?

CVE-2026-2735 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-2735?

Check the references section above for vendor advisories and patch information. Affected products include: Alkacon Opencms.