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GHSA-c5f4-p5wv-2475
No affected components available
Impact
Any user with edit rights can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the included pages in the included documents edit panel.
A proof of concept exploit is to edit a document and add the following code before saving.
{{display reference="{{cache~}~}{{groovy~}~}println(~"Hello from Groovy~" + ~" in included document!~"){{/groovy~}~}{{/cache~}~}"/}}
expected The right had side panels contain:
One included page:
{{cache}}{{groovy}}println("Hello from Groovy" + " in included document!"){{/groovy}}{{/cache}}
actual The right had side panels contain:
One included page:
XWiki.Hello from Groovy in included document!
Patches
The problem has been patched on XWiki 14.4.7, and 14.10.
Workarounds
The issue can be fixed manually applying this patch.
References
- https://github.com/xwiki/xwiki-platform/commit/22f249a0eb9f2a64214628217e812a994419b69f#diff-a51a252f0190274464027342b4e3eafc4ae32de4d9c17ef166e54fc5454c5689R214-R217
- https://jira.xwiki.org/browse/XWIKI-20293
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki.org
- Email us at Security Mailing List
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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