CVE-2026-2735

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 v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:alkacon:opencms:18.0.0:*:*:*:*:*:*:*

History

17 Jun 2026, 10:31

Type	Values Removed	Values Added
Summary		(es) Cross-site scripting (XSS) almacenado en OpenCms v18.0 de Alkacon, que ocurre cuando la entrada del usuario no se valida correctamente al enviar una solicitud POST a '/blog/new-article/org.opencms.ugc.CmsUgcEditService.gwt' utilizando el parámetro 'text'.

23 Feb 2026, 19:16

Type	Values Removed	Values Added
CPE		cpe:2.3:a:alkacon:opencms:18.0.0:::::::*
References	~~() https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms -~~	() https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms - Third Party Advisory
First Time		Alkacon opencms Alkacon
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4

19 Feb 2026, 09:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-19 09:16

Updated : 2026-06-17 10:31

NVD link : CVE-2026-2735

Mitre link : CVE-2026-2735

CVE.ORG link : CVE-2026-2735

JSON object : View

Products Affected

alkacon

opencms

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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