| Package | Affected versions | Patched versions |
|---|---|---|
| org.xwiki.platform:xwiki-platform-oldcore | ≥ 18.0.0-rc-1, < 18.2.0< 17.10.5 | 18.2.017.10.5 |
With Jetty 12+ a user can craft a URL to access any resource the Jetty instance is allowed to access.
For example http://[host]/xwiki/bin/skin/..%252f/..%252f..%252f..%252f..%252f..%252f..%252f..%252fetc/passwd allows downloading the content of the /etc/passwd file, provided Jetty is allowed to read it, and if your XWiki webapp is located exactly 5 levels below / (like /var/lib/jetty/webapps/xwiki, which is the case in the docker image, for example).
Another example which does not go out of the XWiki webapp, but it's still a vulnerability (since users should not be allowed to access Hibernate or XWiki configuration files) is http://[host]/xwiki/bin/skin/..%252f/..%252fWEB-INF/xwiki.cfg.
This vulnerability has been patched in XWiki 17.10.5 and 18.2.0.
A possible workaround is to use a different application server, like Jetty < 12 (in the case of XWiki < 17) or Tomcat, which don't seem to be impacted.
If there are any questions or comments about this advisory:
Lê Ngọc Khoa reported the vulnerability.
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