CVE-2023-45137: XWiki Platform XSS with edit right in the create document form for existing pages
Impact When trying to create a document that already exists, XWiki displays an error message in the form for creating it. Due to missing escaping, this error message is vulnerable to raw HTML injection and thus XSS. The injected code is the document reference of the existing document so this requires that the attacker first creates a non-empty document whose name contains the attack code.
To reproduce, the following steps can be used:
1. Go to <xwiki-host>/xwiki/bin/create/Main/WebHome?parent=&templateprovider=&spaceReference=&name=%3Cimg%20onerror=%22alert(1)%22%20src=%22test%22 where <xwiki-host> is the URL of your XWiki installation. 2. Create the page and add some content. 3. Go again to <xwiki-host>/xwiki/bin/create/Main/WebHome?parent=&templateprovider=&spaceReference=&name=%3Cimg%20onerror=%22alert(1)%22%20src=%22test%22 where <xwiki-host> is the URL of your XWiki installation.
If an alert with content "1" is displayed, the installation is vulnerable. This allows an attacker to execute arbitrary actions with the rights of the user opening the malicious link. Depending on the rights of the user, this may allow remote code execution and full read and write access to the whole XWiki installation.
Patches This has been patched in XWiki 14.10.12 and 15.5RC1 by adding the appropriate escaping.
Workarounds The vulnerable template file createinline.vm is part of XWiki's WAR and can be patched by manually applying the changes from the fix.
Other sources
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. org.xwiki.platform:xwiki-platform-web starting in version 3.1-milestone-2 and prior to version 13.4-rc-1, as well as org.xwiki.platform:xwiki-platform-web-templates prior to versions 14.10.12 and 15.5-rc-1, are vulnerable to cross-site scripting. When trying to create a document that already exists, XWiki displays an error message in the form for creating it. Due to missing escaping, this error message is vulnerable to raw HTML injection and thus XSS. The injected code is the document reference of the existing document so this requires that the attacker first creates a non-empty document whose name contains the attack code. This has been patched in org.xwiki.platform:xwiki-platform-web version 13.4-rc-1 and org.xwiki.platform:xwiki-platform-web-templates versions 14.10.12 and 15.5-rc-1 by adding the appropriate escaping. The vulnerable template file createinline.vm is part of XWiki's WAR and can be patched by manually applying the changes from the fix.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the impact of CVE-2023-45137?
The vulnerability allows for raw HTML injection and XSS.
Which software versions are affected by CVE-2023-45137?
Versions 3.1-milestone-2 to 13.4-rc-1 of org.xwiki.platform:xwiki-platform-web and versions 15.0-rc-1 to 15.5-rc-1 of org.xwiki.platform:xwiki-platform-web-templates are affected.
How severe is CVE-2023-45137?
The severity of the vulnerability is critical with a CVSS score of 9.1.
What is the Common Weakness Enumeration (CWE) ID for CVE-2023-45137?
The CWE ID for this vulnerability is CWE-79.
How can I fix CVE-2023-45137?
Apply the provided patches or upgrade to the specified versions of the affected software packages.