{"id":"CVE-2021-43850","state":"PUBLISHED","title":"Denial of Service in discourse","description":"Discourse is an open source platform for community discussion. In affected versions admins users can trigger a Denial of Service attack via the `/message-bus/_diagnostics` path. The impact of this vulnerability is greater on multisite Discourse instances (where multiple forums are served from a single application server) where any admin user on any of the forums are able to visit the `/message-bus/_diagnostics` path. The problem has been patched. Please upgrade to 2.8.0.beta10 or 2.7.12. No workarounds for this issue exist.","publishedAt":"2022-01-04T19:35:11.000Z","updatedAt":"2025-04-22T18:34:44.857Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["discourse discourse"],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":"< 2.7.12","status":"affected"},{"version":">= 2.8.0.beta, < 2.8.0.beta10","status":"affected"}]}],"references":["https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr","https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T19:49:07.642Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/43xxx/CVE-2021-43850.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-43850","state":"PUBLISHED","datePublished":"2022-01-04T19:35:11.000Z","dateUpdated":"2025-04-22T18:34:44.857Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2021-11-16T00:00:00.000Z"},"containers":{"cna":{"title":"Denial of Service in discourse","descriptions":[{"lang":"en","value":"Discourse is an open source platform for community discussion. In affected versions admins users can trigger a Denial of Service attack via the `/message-bus/_diagnostics` path. The impact of this vulnerability is greater on multisite Discourse instances (where multiple forums are served from a single application server) where any admin user on any of the forums are able to visit the `/message-bus/_diagnostics` path. The problem has been patched. Please upgrade to 2.8.0.beta10 or 2.7.12. No workarounds for this issue exist."}],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":"< 2.7.12","status":"affected"},{"version":">= 2.8.0.beta, < 2.8.0.beta10","status":"affected"}]}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","dateUpdated":"2022-01-04T19:35:11.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-59jr-pj65-qmvr","discovery":"UNKNOWN"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-43850","STATE":"PUBLIC","TITLE":"Denial of Service in discourse"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"discourse","version":{"version_data":[{"version_value":"< 2.7.12"},{"version_value":">= 2.8.0.beta, < 2.8.0.beta10"}]}}]},"vendor_name":"discourse"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Discourse is an open source platform for community discussion. In affected versions admins users can trigger a Denial of Service attack via the `/message-bus/_diagnostics` path. The impact of this vulnerability is greater on multisite Discourse instances (where multiple forums are served from a single application server) where any admin user on any of the forums are able to visit the `/message-bus/_diagnostics` path. The problem has been patched. Please upgrade to 2.8.0.beta10 or 2.7.12. No workarounds for this issue exist."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-20: Improper Input Validation"}]}]},"references":{"reference_data":[{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr","refsource":"CONFIRM","url":"https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr"},{"name":"https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39","refsource":"MISC","url":"https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39"}]},"source":{"advisory":"GHSA-59jr-pj65-qmvr","discovery":"UNKNOWN"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T04:10:16.294Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-04-22T15:52:29.625195Z","id":"CVE-2021-43850","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-22T18:34:44.857Z"}}]}}}