CVE-2019-10905: Code Injection

April 6, 2019 (updated August 2, 2019)

Parsedown, when safe mode is used and HTML markup is disabled, might allow attackers to execute arbitrary JavaScript code if a script (already running on the affected page) executes the contents of any element with a specific class. This occurs because spaces are permitted in code block infostrings, which interferes with the intended behavior of a single class name beginning with the language- substring.

References

github.com/erusev/parsedown/issues/699
nvd.nist.gov/vuln/detail/CVE-2019-10905

Code Behaviors & Features

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