CVE-2026-2735
Stored XSS in OpenCms v18.0 Blog Article Submission
Publication date: 2026-02-19
Last updated on: 2026-02-23
Assigner: Spanish National Cybersecurity Institute, S.A. (INCIBE)
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| alkacon | opencms | 18.0.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a Stored Cross-Site Scripting (XSS) issue in Alkacon's OpenCms version 18.0. It happens because user input is not properly validated when a POST request is made to the endpoint '/blog/new-article/org.opencms.ugc.CmsUgcEditService.gwt' using the 'text' parameter.
How can this vulnerability impact me? :
An attacker could exploit this vulnerability to inject malicious scripts into the application, which would then be stored and executed in the context of other users who view the affected content. This can lead to unauthorized actions, theft of user credentials, session hijacking, or other malicious activities.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know