{"id":"CVE-2026-33300","state":"PUBLISHED","title":"Discourse: Hidden group names and access metadata are exposed to moderators through the `category-chatables` endpoint","description":"Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass in the Category Chatables Controller show action allowed moderators to get information on hidden groups names and user count. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.","publishedAt":"2026-03-31T17:42:00.882Z","updatedAt":"2026-04-01T18:34:16.767Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["discourse discourse"],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":">= 2026.1.0-latest, < 2026.1.3","status":"affected"},{"version":">= 2026.2.0-latest, < 2026.2.2","status":"affected"},{"version":">= 2026.3.0-latest, < 2026.3.0","status":"affected"}]}],"references":["https://github.com/discourse/discourse/security/advisories/GHSA-wrwm-vqx2-6x4v","https://github.com/discourse/discourse/commit/07f66658cce81a099a0d7115db5f3c69f5d3cca2"],"weaknesses":["CWE-200"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33300.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33300","state":"PUBLISHED","datePublished":"2026-03-31T17:42:00.882Z","dateUpdated":"2026-04-01T18:34:16.767Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-18T18:55:47.427Z"},"containers":{"cna":{"title":"Discourse: Hidden group names and access metadata are exposed to moderators through the `category-chatables` endpoint","descriptions":[{"lang":"en","value":"Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass in the Category Chatables Controller show action allowed moderators to get information on hidden groups names and user count. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0."}],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":">= 2026.1.0-latest, < 2026.1.3","status":"affected"},{"version":">= 2026.2.0-latest, < 2026.2.2","status":"affected"},{"version":">= 2026.3.0-latest, < 2026.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-wrwm-vqx2-6x4v","name":"https://github.com/discourse/discourse/security/advisories/GHSA-wrwm-vqx2-6x4v","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/discourse/discourse/commit/07f66658cce81a099a0d7115db5f3c69f5d3cca2","name":"https://github.com/discourse/discourse/commit/07f66658cce81a099a0d7115db5f3c69f5d3cca2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-200","lang":"en","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-31T17:42:00.882Z"},"source":{"advisory":"GHSA-wrwm-vqx2-6x4v","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-01T18:34:07.503883Z","id":"CVE-2026-33300","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-01T18:34:16.767Z"}}]}}}