CVE-2023-29201

Description

XWiki Commons are technical libraries common to several other top level XWiki projects. The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1, only escaped `<script>` and `<style>`-tags but neither attributes that can be used to inject scripts nor other dangerous HTML tags like `<iframe>`. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site scripting"/XSS). When a privileged user with programming rights visits such a comment in XWiki, the malicious JavaScript code is executed in the context of the user session. This allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance. This problem has been patched in XWiki 14.6 RC1 with the introduction of a filter with allowed HTML elements and attributes that is enabled in restricted mode. There are no known workarounds apart from upgrading to a version including the fix.

Weakness classification

• security-advisories@github.com: CWE-79

Primary references

• security-advisories@github.com — Patch
• security-advisories@github.com — Patch
• security-advisories@github.com — Exploit, Patch, Vendor Advisory
• security-advisories@github.com — Exploit, Issue Tracking
• security-advisories@github.com — Exploit, Issue Tracking
• security-advisories@github.com — Exploit, Issue Tracking
• af854a3a-2127-422b-91ae-364da2661108 — Patch
• af854a3a-2127-422b-91ae-364da2661108 — Patch
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking