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-rendering-parser
to version 13.10.10, 14.9-rc-1 or higher.
Affected versions of this package are vulnerable to Improper Handling of Exceptional Conditions such that users with write
rights can insert well-formed content that is not handled well by the parser. As a consequence, some pages become unusable, including the user index (if the page containing the faulty content is a user page) and the page index.
A temporary workaround to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the -Xss
JVM parameter (e.g., -Xss32m
). This should allow the parser to pass and to fix the faulty content. The consequences for other aspects of the system (e.g., performance) are unknown, and this workaround should be only be used as a temporary solution. The workaround does not prevent the issue from occurring again with other content.