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EUVD-2026-348631

fkie_cve-2025-66024

The XWiki blog application allows users of the XWiki platform to create and manage blog posts. Versions starting with 9.15 and prior to 9.15.7 are vulnerable to Stored Cross-Site Scripting (XSS) via the Blog Post Title. The vulnerability arises because the post title is injected directly into the HTML <title> tag without proper escaping. An attacker with permissions to create or edit blog posts can inject malicious JavaScript into the title field. This script will execute in the browser of any user (including administrators) who views the blog post. This leads to potential session hijacking or privilege escalation. The vulnerability has been patched in the blog application version 9.15.7 by adding missing escaping. No known workarounds are available.

GHSA-h2xq-h7f9-vh6c — XWiki Blog Application home page vulnerable to Stored XSS via Post Title

Affected: Maven: org.xwiki.contrib.blog:application-blog-ui

### Impact

The Blog Application is vulnerable to Stored Cross-Site Scripting (XSS) via the Blog Post Title. The vulnerability arises because the post title is injected directly into the HTML `<title>` tag without proper escaping.

An attacker with permissions to create or edit blog posts can inject malicious JavaScript into the title field. This script will execute in the browser of any user (including administrators) who views the blog post. This leads to potential session hijacking or privilege escalation.

To reproduce:

* Log in as a user with rights to create blog posts. * Create a new blog post. * In the Title field, insert the following payload designed to break out of the title tag: ```</title><script>alert('XSS in title blog')</script>``` * Save (Publish) the post. * View the post in the blog home page

### Patches The vulnerability has been patched in the blog application version 9.15.7 by adding missing escaping.

### Workarounds We're not aware of any workarounds.

### References * https://jira.xwiki.org/browse/BLOG-245 * https://github.com/xwiki-contrib/application-blog/commit/cca87f0a0edc2e7e049d46d51f4a4d8f78b714ba

### Attribution

Łukasz Rybak reported this vulnerability.

WID-SEC-W-2026-0600 — xwiki Blog Application: Schwachstelle ermöglicht Cross-Site Scripting

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in der xwiki Blog Application ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.