{"items":[{"id":"NVI-00013241","kind":"vulnerability","title":"User impersonation due to incorrect handling of the login JWT","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-h77f-xxx7-4858","CVE-2021-39177"],"plain_summary":"GitHub lists this reviewed advisory for org.geysermc:connector. 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-03036b9009023e5e77c56aecdcb6905d"],"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":"2026-10-01T18:41:49.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-a0e283814185f9a702bc1c7fbe4a4cf2"},{"kind":"CVSS","as_of":"2026-06-17T04:03:15.263Z","value":"7.5 HIGH (2.0)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-22ac5b381b4a23c220b80dfa3da9961c"},{"kind":"CVSS","as_of":"2026-06-17T04:03:15.263Z","value":"7.4 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-22ac5b381b4a23c220b80dfa3da9961c"},{"kind":"CVSS","as_of":"2026-06-17T04:03:15.263Z","value":"9.8 CRITICAL (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-22ac5b381b4a23c220b80dfa3da9961c"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"1.443%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.73276. Missing scores are unknown.","source_id":"sr-03036b9009023e5e77c56aecdcb6905d"}],"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-a0e283814185f9a702bc1c7fbe4a4cf2","url":"https://github.com/advisories/GHSA-h77f-xxx7-4858","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. 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Dataset date/model retained; FIRST services terms apply.","title":"CVE-2021-39177","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:42:56.080Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a0e283814185f9a702bc1c7fbe4a4cf2"],"technology":"org.geysermc:connector","known_exclusions":[],"conditions_summary":"### Impact\n\nThis allows anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any Bedrock user. Unless credentials are saved in your configuration, online mode is not affected as users are still required to log in separately. If your credentials are saved, there is no risk of exposing your email or password.\n\n### Patches\n\nThis was patched as part of https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6 and https://github.com/GeyserMC/Geyser/commit/ab2f5b326fe590e09167e8b45b4b165ac06ecd13. if your Geyser version is `1.4.2-SNAPSHOT` or later, the issue has been addressed on your build.\n\n### Workarounds\n\nGeyser strongly recommends updating to fix this issue. If this isn't possible:\n- Use online mode and don't save credentials in your Geyser configuration\n- Use an additional authentication method on the Java server\n\n### References\n<!--_Are there any links users can visit to fi","public_affected_ranges":["< 1.4.2-SNAPSHOT"]}],"null_published_at":"2026-11-04T10:04:41.538Z","source_updated_at":"2026-10-01T18:41:49.000Z","source_disclosed_at":"2021-09-07T23:04:04.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T01:40:00.567Z"},{"id":"NVI-00013241","kind":"vulnerability","title":"User impersonation due to incorrect handling of the login JWT","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-h77f-xxx7-4858","CVE-2021-39177"],"plain_summary":"GitHub lists this reviewed advisory for org.geysermc:connector. 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-22ac5b381b4a23c220b80dfa3da9961c"],"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":"2026-10-01T18:41:49.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-a0e283814185f9a702bc1c7fbe4a4cf2"},{"kind":"CVSS","as_of":"2026-06-17T04:03:15.263Z","value":"7.5 HIGH (2.0)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-22ac5b381b4a23c220b80dfa3da9961c"},{"kind":"CVSS","as_of":"2026-06-17T04:03:15.263Z","value":"7.4 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-22ac5b381b4a23c220b80dfa3da9961c"},{"kind":"CVSS","as_of":"2026-06-17T04:03:15.263Z","value":"9.8 CRITICAL (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-22ac5b381b4a23c220b80dfa3da9961c"}],"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-a0e283814185f9a702bc1c7fbe4a4cf2","url":"https://github.com/advisories/GHSA-h77f-xxx7-4858","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-h77f-xxx7-4858","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:40:00.567Z"},{"id":"sr-22ac5b381b4a23c220b80dfa3da9961c","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39177","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2021-39177","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T22:54:16.864Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a0e283814185f9a702bc1c7fbe4a4cf2"],"technology":"org.geysermc:connector","known_exclusions":[],"conditions_summary":"### Impact\n\nThis allows anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any Bedrock user. Unless credentials are saved in your configuration, online mode is not affected as users are still required to log in separately. If your credentials are saved, there is no risk of exposing your email or password.\n\n### Patches\n\nThis was patched as part of https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6 and https://github.com/GeyserMC/Geyser/commit/ab2f5b326fe590e09167e8b45b4b165ac06ecd13. if your Geyser version is `1.4.2-SNAPSHOT` or later, the issue has been addressed on your build.\n\n### Workarounds\n\nGeyser strongly recommends updating to fix this issue. If this isn't possible:\n- Use online mode and don't save credentials in your Geyser configuration\n- Use an additional authentication method on the Java server\n\n### References\n<!--_Are there any links users can visit to fi","public_affected_ranges":["< 1.4.2-SNAPSHOT"]}],"null_published_at":"2026-11-02T10:00:44.513Z","source_updated_at":"2026-10-01T18:41:49.000Z","source_disclosed_at":"2021-09-07T23:04:04.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-01T01:40:00.567Z"},{"id":"NVI-00013241","kind":"vulnerability","title":"User impersonation due to incorrect handling of the login JWT","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-h77f-xxx7-4858","CVE-2021-39177"],"plain_summary":"GitHub lists this reviewed advisory for org.geysermc:connector. 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If your credentials are saved, there is no risk of exposing your email or password.\n\n### Patches\n\nThis was patched as part of https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6 and https://github.com/GeyserMC/Geyser/commit/ab2f5b326fe590e09167e8b45b4b165ac06ecd13. if your Geyser version is `1.4.2-SNAPSHOT` or later, the issue has been addressed on your build.\n\n### Workarounds\n\nGeyser strongly recommends updating to fix this issue. If this isn't possible:\n- Use online mode and don't save credentials in your Geyser configuration\n- Use an additional authentication method on the Java server\n\n### References\n<!--_Are there any links users can visit to fi","public_affected_ranges":["< 1.4.2-SNAPSHOT"]}],"null_published_at":"2026-11-01T07:29:12.931Z","source_updated_at":"2026-10-01T18:41:49.000Z","source_disclosed_at":"2021-09-07T23:04:04.000Z","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":"2026-11-01T01:40:00.567Z"}],"next_cursor":null,"snapshot_revision":"42594"}