{"id":"CVE-2020-10534","aliases":["BIT-mediawiki-2020-10534","EUVD-2020-2987","GHSA-rmqj-6c77-6qch"],"status":"published","title":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related...","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0121,"percentile":0.6868,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269","CWE-863"],"published":"2020-03-12T22:14:41Z","modified":"2026-10-24T10:30:43Z","fixes":[{"ecosystem":"Bitnami","package":"mediawiki","fixed_in":["1.34.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mediawiki","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.34.1"}]}]}],"products":[{"vendor":"mediawiki","product":"mediawiki"}],"references":[{"url":"https://phabricator.wikimedia.org/T229731","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","web","advisory"]},{"url":"https://gerrit.wikimedia.org/r/#/q/I9cc5fb2c08c78bbd797a5fc6d89f4577c8cc118b","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","web","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10534","tags":["web"]},{"url":"https://github.com/advisories/GHSA-rmqj-6c77-6qch"}],"sources":{"cve":[{"id":"CVE-2020-10534","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","status":"published","published":"2020-03-12T22:14:41Z","modified":"2024-08-04T11:06:09.447Z","updated_at":"2026-11-02T14:35:48.213211Z"}],"euvd":[{"id":"EUVD-2020-2987","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","status":"published","published":"2020-03-12T22:14:41Z","modified":"2024-08-04T11:06:09Z","updated_at":"2026-11-03T03:07:49.909738Z"}],"ghsa":[{"id":"GHSA-rmqj-6c77-6qch","title":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related...","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","status":"published","published":"2022-05-24T17:11:22Z","modified":"2023-01-29T05:01:59Z","cwes":["CWE-269"],"updated_at":"2026-11-02T14:44:57.695191Z"}],"nvd":[{"id":"CVE-2020-10534","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","status":"published","published":"2020-03-12T23:15:12.233Z","modified":"2026-06-17T02:47:57.89Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:05:55.32877Z"}],"osv":[{"id":"CVE-2020-10534","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","status":"published","published":"2020-03-12T23:15:12.233Z","modified":"2026-10-24T10:30:43.253190851Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:13.492058Z"},{"id":"BIT-mediawiki-2020-10534","description":"In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.","status":"published","published":"2024-03-06T11:14:09.778Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}