Summary
org.xwiki.platform:xwiki-platform-skin-skinx vulnerable to basic Cross-site Scripting by exploiting JSX or SSX plugins
Workarounds
The only known workaround consists in applying the following patch and rebuilding and redeploying xwiki-platform-skin-skinx.
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira
- Email us at Security ML
Impact
There was no check in the author of a JavaScript xobject or StyleSheet xobject added in a XWiki document, so until now it was possible for a user having only Edit Right to create such object and to craft a script allowing to perform some operations when executing by a user with appropriate rights.
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-2023-29206 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 (14.9-rc-1); 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 14.9-rc-1 by only executing the script if the author of it has Script right.
Frequently Asked Questions
- What is CVE-2023-29206? CVE-2023-29206 is a critical-severity cross-site scripting (XSS) vulnerability in org.xwiki.platform:xwiki-platform-skin-skinx (maven), affecting versions >= 3.0-milestone-1, < 14.9-rc-1. It is fixed in 14.9-rc-1. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
- How severe is CVE-2023-29206? CVE-2023-29206 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-skin-skinx are affected by CVE-2023-29206? org.xwiki.platform:xwiki-platform-skin-skinx (maven) versions >= 3.0-milestone-1, < 14.9-rc-1 is affected.
- Is there a fix for CVE-2023-29206? Yes. CVE-2023-29206 is fixed in 14.9-rc-1. Upgrade to this version or later.
- Is CVE-2023-29206 exploitable, and should I be worried? Whether CVE-2023-29206 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-2023-29206 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-2023-29206? Upgrade
org.xwiki.platform:xwiki-platform-skin-skinxto 14.9-rc-1 or later.