{"id":"CVE-2026-100241","state":"PUBLISHED","title":"Private change tags exposed to anonymous users via revision-tags-change events","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - EventBus Extension allows Excavation.\n\nThis issue affects Mediawiki - EventBus Extension: 1.47.0-alpha.","publishedAt":"2026-09-29T16:36:22.492Z","updatedAt":"2026-09-30T20:46:06.489Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"CISA-ADP"},"assigner":"wikimedia-foundation","products":["Wikimedia Foundation Mediawiki - EventBus Extension"],"affected":[{"vendor":"Wikimedia Foundation","product":"Mediawiki - EventBus Extension","defaultStatus":"unaffected","versions":[{"version":"1.47.0-alpha","status":"affected"}],"repo":"https://gerrit.wikimedia.org/g/mediawiki/extensions/EventBus/+/refs/heads/master"}],"references":["https://phabricator.wikimedia.org/T432948","https://gerrit.wikimedia.org/r/q/I6d79037edc771fe9a2889c543e12cf7b1296aab8"],"weaknesses":["CWE-200"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100241.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100241","state":"PUBLISHED","datePublished":"2026-09-29T16:36:22.492Z","dateUpdated":"2026-09-30T20:46:06.489Z","assignerShortName":"wikimedia-foundation","assignerOrgId":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","dateReserved":"2026-09-25T16:02:34.842Z"},"containers":{"cna":{"title":"Private change tags exposed to anonymous users via revision-tags-change events","descriptions":[{"lang":"en","value":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - EventBus Extension allows Excavation.\n\nThis issue affects Mediawiki - EventBus Extension: 1.47.0-alpha."}],"affected":[{"vendor":"Wikimedia Foundation","product":"Mediawiki - EventBus Extension","defaultStatus":"unaffected","versions":[{"version":"1.47.0-alpha","status":"affected"}],"repo":"https://gerrit.wikimedia.org/g/mediawiki/extensions/EventBus/+/refs/heads/master"}],"references":[{"url":"https://phabricator.wikimedia.org/T432948"},{"url":"https://gerrit.wikimedia.org/r/q/I6d79037edc771fe9a2889c543e12cf7b1296aab8"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-200","lang":"en","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor","type":"CWE"}]}],"providerMetadata":{"shortName":"wikimedia-foundation","orgId":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","dateUpdated":"2026-09-29T16:36:22.492Z"},"impacts":[{"capecId":"CAPEC-116","descriptions":[{"lang":"en","value":"CAPEC-116 Excavation"}]}],"credits":[{"lang":"en","value":"kostajh","type":"finder"}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T20:45:45.604285Z","id":"CVE-2026-100241","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":"2026-09-30T20:46:06.489Z"}}]}}}