{"id":"CVE-2026-53947","sourceIdentifier":"security-advisories@github.com","published":"2026-06-24T19:17:12.337","lastModified":"2026-06-25T18:16:39.913","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. This vulnerability is fixed in 6.21.1."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"TryGhost","product":"Ghost","versions":[{"version":">= 5.18.0, < 6.21.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-25T17:09:11.479372Z","id":"CVE-2026-53947","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-204"}]}],"references":[{"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42","source":"security-advisories@github.com"}]}