{"api_version":"1","generated_at":"2026-04-23T08:41:04+00:00","cve":"CVE-2021-32763","urls":{"html":"https://cve.report/CVE-2021-32763","api":"https://cve.report/api/cve/CVE-2021-32763.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-32763","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-32763"},"summary":{"title":"CVE-2021-32763","description":"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. 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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.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"32763","Ordinal":"2","NoteData":"2021-07-20","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"32763","Ordinal":"3","NoteData":"2021-07-20","Type":"Other","Title":"Modified"}]}}}