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GHSA-35j5-m29r-xfq5
No affected components available
Impact
The footnote macro executed its content in a potentially different context than the one in which it was defined. In particular in combination with the include macro, this allows privilege escalation from a simple user account in XWiki to programming rights and thus remote code execution, impacting the confidentiality, integrity and availability of the whole XWiki installation.
To reproduce, perform the following steps:
- Edit your user profile with the object editor and add an object of type DocumentSheetBinding with value XWiki.ClassSheet
- Edit your user profile with the wiki editor and add the syntax
{{footnote}}{{groovy}}println("Hello " + "from groovy!"){{/groovy}}{{/footnote}}
When the text "Hello from groovy!" is displayed at the bottom of the document, the installation is vulnerable. Instead, an error should be displayed.
Patches
This vulnerability has been patched in XWiki 14.10.6 and 15.1-rc-1.
Workarounds
There is no workaround apart from upgrading to a fixed version of the footnote macro.
References
- https://jira.xwiki.org/browse/XRENDERING-688
- https://github.com/xwiki/xwiki-rendering/commit/5f558b8fac8b716d19999225f38cb8ed0814116e
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 impact is confined to the system where the vulnerability exists. 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.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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