{"id":"CVE-2021-32763","state":"PUBLISHED","title":"Regular Expression Denial of Service in OpenProject forum messages","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. As a workaround, one may install the patch manually.","publishedAt":"2021-07-20T16:50:10.000Z","updatedAt":"2024-08-03T23:33:55.735Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["opf openproject"],"affected":[{"vendor":"opf","product":"openproject","versions":[{"version":"< 11.3.3","status":"affected"}]}],"references":["https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f","https://github.com/opf/openproject/pull/9447.patch"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T19:48:33.225Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/32xxx/CVE-2021-32763.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-32763","state":"PUBLISHED","datePublished":"2021-07-20T16:50:10.000Z","dateUpdated":"2024-08-03T23:33:55.735Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2021-05-12T00:00:00.000Z"},"containers":{"cna":{"title":"Regular Expression Denial of Service in OpenProject forum messages","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"opf","product":"openproject","versions":[{"version":"< 11.3.3","status":"affected"}]}],"references":[{"url":"https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/opf/openproject/pull/9447.patch","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","dateUpdated":"2021-07-20T16:50:10.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-qqvp-j6gm-q56f","discovery":"UNKNOWN"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-32763","STATE":"PUBLIC","TITLE":"Regular Expression Denial of Service in OpenProject forum messages"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"openproject","version":{"version_data":[{"version_value":"< 11.3.3"}]}}]},"vendor_name":"opf"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-400: Uncontrolled Resource Consumption"}]}]},"references":{"reference_data":[{"name":"https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f","refsource":"CONFIRM","url":"https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f"},{"name":"https://github.com/opf/openproject/pull/9447.patch","refsource":"MISC","url":"https://github.com/opf/openproject/pull/9447.patch"}]},"source":{"advisory":"GHSA-qqvp-j6gm-q56f","discovery":"UNKNOWN"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/opf/openproject/pull/9447.patch","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T23:33:55.735Z"}}]}}}