Summary
XWiki Platform allows XSS through XClass name in string properties
Reproduction steps
- As a user without script or programming right, create a (non-terminal) document named
" + alert(1) + "(the quotes need to be part of the name). - Edit the class.
- Add a string property named
"test". - Edit using the object editor and add an object of the created class
- Get an admin to open
<xwiki-server>/xwiki/bin/view/%22%20%2B%20alert(1)%20%2B%20%22/?viewer=display&type=object&property=%22%20%2B%20alert(1)%20%2B%20%22.WebHome.test&mode=editwhere<xwiki-server>is the URL of your XWiki installation.
Workarounds
We're not aware of any workaround except upgrading.
References
Impact
Is it possible for a user without Script or Programming rights to craft a URL pointing to a page with arbitrary JavaScript.
This requires social engineer to trick a user to follow the URL.
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
CVE-2024-43400 has a CVSS score of 9.0 (Critical). The vector is network-reachable, low privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (14.10.21, 15.5.5, 15.10.6, 16.0.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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This has been patched in XWiki 14.10.21, 15.5.5, 15.10.6 and 16.0.0.
Frequently Asked Questions
- What is CVE-2024-43400? CVE-2024-43400 is a critical-severity cross-site scripting (XSS) vulnerability in org.xwiki.platform:xwiki-platform-oldcore (maven), affecting versions >= 1.1.2, < 14.10.21. It is fixed in 14.10.21, 15.5.5, 15.10.6, 16.0.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
- How severe is CVE-2024-43400? CVE-2024-43400 has a CVSS score of 9.0 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of org.xwiki.platform:xwiki-platform-oldcore are affected by CVE-2024-43400? org.xwiki.platform:xwiki-platform-oldcore (maven) versions >= 1.1.2, < 14.10.21 is affected.
- Is there a fix for CVE-2024-43400? Yes. CVE-2024-43400 is fixed in 14.10.21, 15.5.5, 15.10.6, 16.0.0. Upgrade to this version or later.
- Is CVE-2024-43400 exploitable, and should I be worried? Whether CVE-2024-43400 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2024-43400 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2024-43400?
- Upgrade
org.xwiki.platform:xwiki-platform-oldcoreto 14.10.21 or later - Upgrade
org.xwiki.platform:xwiki-platform-oldcoreto 15.5.5 or later - Upgrade
org.xwiki.platform:xwiki-platform-oldcoreto 15.10.6 or later - Upgrade
org.xwiki.platform:xwiki-platform-oldcoreto 16.0.0 or later
- Upgrade