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GHSA-7654-vfh6-rw6x
No affected components available
Impact
The search administration interface doesn't properly escape the id and label of search user interface extensions, allowing the injection of XWiki syntax containing script macros including Groovy macros that allow remote code execution, impacting the confidentiality, integrity and availability of the whole XWiki instance. This attack can be executed by any user who can edit some wiki page like the user's profile (editable by default) as user interface extensions that will be displayed in the search administration can be added on any document by any user.
To reproduce, edit any document with the object editor, add an object of type XWiki.UIExtensionClass, set "Extension Point Id" to org.xwiki.platform.search, set "Extension ID" to {{async}}{{groovy}}services.logging.getLogger("attacker").error("Attack from extension id succeeded!"){{/groovy}}{{/async}}, set "Extension Parameters" to label={{async}}{{groovy}}services.logging.getLogger("attacker").error("Attack from label succeeded!"){{/groovy}}{{/async}} and "Extension Scope" to "Current User". Then open the page XWiki.SearchAdmin, e.g., on http://localhost:8080/xwiki/bin/view/XWiki/SearchAdmin. If there are error log messages in XWiki's log that announce that attacks succeeded, the instance is vulnerable.
Patches
The necessary escaping has been added in XWiki 14.10.15, 15.5.2 and 15.7RC1.
Workarounds
The patch can be manually applied to the page XWiki.SearchAdmin.
References
- https://github.com/xwiki/xwiki-platform/commit/62863736d78ffd60d822279c5fb7fb9593042766
- https://jira.xwiki.org/browse/XWIKI-21200
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.
The exploit probability is very high. The vulnerability is very likely 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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