{"id":"CVE-2026-0817","state":"PUBLISHED","title":"CampaignEvents API missing authorization exposes meeting and chat URLs","description":"Missing Authorization vulnerability in Wikimedia Foundation MediaWiki - CampaignEvents extension allows Privilege Abuse.This issue affects MediaWiki - CampaignEvents extension: 1.45, 1.44, 1.43, 1.39.","publishedAt":"2026-01-09T15:50:50.616Z","updatedAt":"2026-01-09T17:37:36.036Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"CISA-ADP"},"assigner":"wikimedia-foundation","products":["Wikimedia Foundation MediaWiki - CampaignEvents extension"],"affected":[{"vendor":"Wikimedia Foundation","product":"MediaWiki - CampaignEvents extension","defaultStatus":"unaffected","versions":[{"version":"1.45","status":"affected"},{"version":"1.44","status":"affected"},{"version":"1.43","status":"affected"},{"version":"1.39","status":"affected"}],"repo":"https://gerrit.wikimedia.org/g/mediawiki/extensions/CampaignEvents"}],"references":["https://phabricator.wikimedia.org/T410560","https://gerrit.wikimedia.org/r/q/I7ed0049691258c8bd2555e599b9b88490fbe3358"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/0xxx/CVE-2026-0817.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-0817","state":"PUBLISHED","datePublished":"2026-01-09T15:50:50.616Z","dateUpdated":"2026-01-09T17:37:36.036Z","assignerShortName":"wikimedia-foundation","assignerOrgId":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","dateReserved":"2026-01-09T15:44:08.294Z"},"containers":{"cna":{"title":"CampaignEvents API missing authorization exposes meeting and chat URLs","descriptions":[{"lang":"en","value":"Missing Authorization vulnerability in Wikimedia Foundation MediaWiki - CampaignEvents extension allows Privilege Abuse.This issue affects MediaWiki - CampaignEvents extension: 1.45, 1.44, 1.43, 1.39."}],"affected":[{"vendor":"Wikimedia Foundation","product":"MediaWiki - CampaignEvents extension","defaultStatus":"unaffected","versions":[{"version":"1.45","status":"affected"},{"version":"1.44","status":"affected"},{"version":"1.43","status":"affected"},{"version":"1.39","status":"affected"}],"repo":"https://gerrit.wikimedia.org/g/mediawiki/extensions/CampaignEvents"}],"references":[{"url":"https://phabricator.wikimedia.org/T410560"},{"url":"https://gerrit.wikimedia.org/r/q/I7ed0049691258c8bd2555e599b9b88490fbe3358"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","description":"CWE-862 Missing Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"wikimedia-foundation","orgId":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","dateUpdated":"2026-01-09T15:50:50.616Z"},"impacts":[{"capecId":"CAPEC-122","descriptions":[{"lang":"en","value":"CAPEC-122 Privilege Abuse"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.3,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-01-09T17:35:46.425216Z","id":"CVE-2026-0817","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-09T17:37:36.036Z"}}]}}}