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Vulnerability Details CVE-2021-32763

OpenProject is open-source, web-based project management software. In versions prior to 11.3.3, the `MessagesController` class of OpenProject has a `quote` method that implements the logic behind the Quote button in the discussion forums, and it uses a regex to strip `<pre>` tags from the message being quoted. The `(.|\s)` part can match a space character in two ways, so an unterminated `<pre>` tag containing `n` spaces causes Ruby's regex engine to backtrack to try 2<sup>n</sup> states in the NFA. This will result in a Regular Expression Denial of Service. The issue is fixed in OpenProject 11.3.3. As a workaround, one may install the patch manually.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 53.5%
CVSS Severity
CVSS v3 Score 4.3
CVSS v2 Score 4.0
Products affected by CVE-2021-32763


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