GHSA-vxwr-wpjv-qjq7
XWiki Platform: Privilege escalation (PR) from user registration through PDFClass
Quick fix
GHSA-vxwr-wpjv-qjq7 — org.xwiki.platform:xwiki-platform-oldcore: upgrade to the fixed version with the command below.
# pom.xml: bump <version>14.10.20</version> for org.xwiki.platform:xwiki-platform-oldcoreDetails
### Impact Remote code execution is possible via PDF export templates. To reproduce on an installation, register a new user account with username `PDFClass` if `XWiki.PDFClass` does not exist. On `XWiki.PDFClass`, use the class editor to add a "style" property of type "TextArea" and content type "Plain Text". Then, add an object of class `PDFClass` and set the "style" attribute to `$services.logging.getLogger('PDFClass').error("I got programming: $services.security.authorization.hasAccess('programming')")`. Finally, go to `<host>/xwiki/bin/export/Main/WebHome?format=pdf&pdftemplate=XWiki.PDFClass`. If the logs contain "ERROR PDFClass - I got programming: true", the instance is vulnerable.
### Patches This vulnerability has been patched in XWiki 14.10.20, 15.5.4 and 15.10-rc-1.
### Workarounds If PDF templates are not typically used on the instance, an administrator can create the document `XWiki.PDFClass` and block its edition, after making sure that it does not contain a `style` attribute. Otherwise, the instance needs to be updated.
### References - https://jira.xwiki.org/browse/XWIKI-21337 - https://github.com/xwiki/xwiki-platform/commit/d28e21a670c69880b951e415dd2ddd69d273eae9
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Affected packages
3.0.1Fixed in: 14.10.20# pom.xml: bump <version>14.10.20</version> for org.xwiki.platform:xwiki-platform-oldcore15.0-rc-1Fixed in: 15.5.4# pom.xml: bump <version>15.5.4</version> for org.xwiki.platform:xwiki-platform-oldcore15.6-rc-1Fixed in: 15.10-rc-1# pom.xml: bump <version>15.10-rc-1</version> for org.xwiki.platform:xwiki-platform-oldcoreReferences
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vxwr-wpjv-qjq7[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2024-31981[ADVISORY]
- https://github.com/xwiki/xwiki-platform/commit/480186f9d2fca880513da8bc5a609674d106cbd3[WEB]
- https://github.com/xwiki/xwiki-platform/commit/a4ad14d9c1605a5ab957237e505ebbb29f5b9d73[WEB]
- https://github.com/xwiki/xwiki-platform/commit/d28e21a670c69880b951e415dd2ddd69d273eae9[WEB]
- https://github.com/xwiki/xwiki-platform[PACKAGE]
- https://jira.xwiki.org/browse/XWIKI-21337[WEB]