{"items":[{"id":"NVI-00015148","kind":"vulnerability","title":"Ghost: Member existence leak via magic link sign-in response","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-chgm-3698-jm42","CVE-2026-53947"],"plain_summary":"GitHub lists this reviewed advisory for ghost. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2e5180bbd7c12db8e1af51105d76871d"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-04T21:56:14.000Z","value":"5.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2e5180bbd7c12db8e1af51105d76871d"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2e5180bbd7c12db8e1af51105d76871d","url":"https://github.com/advisories/GHSA-chgm-3698-jm42","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-chgm-3698-jm42","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:09.980Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2e5180bbd7c12db8e1af51105d76871d"],"technology":"ghost","known_exclusions":[],"conditions_summary":"### Impact\n\nA 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.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v5.18.0 up to v6.21.0.\n\n### Patches\n\nv6.21.1 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here. \n\nIf your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here. \n\n### For more information\n\nIf you have any questions or comments about this advisory, email Ghost at security@ghost.org.","public_affected_ranges":[">= 5.18.0, < 6.21.1"]}],"null_published_at":"2026-11-03T10:03:26.554Z","source_updated_at":"2026-08-04T21:56:14.000Z","source_disclosed_at":"2026-08-04T21:56:13.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T09:58:09.980Z"}],"next_cursor":null,"snapshot_revision":"42594"}