{"id":"CVE-2023-5969","aliases":["EUVD-2023-3048","GHSA-w496-f5qq-m58j"],"status":"published","title":"Denial of Service via Link Preview in /api/v4/redirect_location","description":"Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00634,"percentile":0.50695,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2023-11-06T15:48:23Z","modified":"2026-10-28T02:30:49Z","fixes":[{"ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v6","fixed_in":["7.8.12"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","fixed_in":["8.0.4","8.1.3","9.0.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.8.12"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.0.4"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.1.0"},{"fixed":"8.1.3"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"last_affected":"9.0.0"},{"fixed":"9.0.1"}]}],"versions":["9.0.0"]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v6","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.8.12"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.0.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"introduced":"8.1.0"},{"fixed":"8.1.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.0"},{"fixed":"9.0.1"}]}],"versions":["9.0.0"]}],"products":[{"vendor":"mattermost","product":"mattermost"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5969","tags":["advisory"]},{"url":"https://github.com/mattermost/mattermost/pull/24429","tags":["web"]},{"url":"https://github.com/mattermost/mattermost/commit/77f094c7ee8c7a00be01c2df72f948a62c690b66","tags":["web"]},{"url":"https://github.com/advisories/GHSA-w496-f5qq-m58j"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5969.json","tags":["advisory"]},{"url":"https://github.com/mattermost/mattermost","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-5969","title":" Denial of Service via Link Preview in /api/v4/redirect_location","description":"Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.\n\n","status":"published","published":"2023-11-06T15:48:23.59Z","modified":"2024-09-17T13:07:28.847Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:35:17.149492Z"}],"euvd":[{"id":"EUVD-2023-3048","description":"Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.\n\n","status":"published","published":"2023-11-06T15:48:23Z","modified":"2024-09-17T13:07:28Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T00:28:22.706109Z"}],"ghsa":[{"id":"GHSA-w496-f5qq-m58j","title":"Mattermost vulnerable to excessive memory consumption","description":"Mattermost fails to properly sanitize the request to `/api/v4/redirect_location` allowing an attacker, sending a specially crafted request to `/api/v4/redirect_location`, to fill up the memory due to caching large items.\n\n","status":"published","published":"2023-11-06T18:30:19Z","modified":"2023-11-23T01:40:54Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:37:22.840002Z"}],"nvd":[{"id":"CVE-2023-5969","description":"Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.\n\n","status":"published","published":"2023-11-06T16:15:42.987Z","modified":"2026-06-17T06:49:46.057Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:08:43.669554Z"}],"osv":[{"id":"CVE-2023-5969","title":" Denial of Service via Link Preview in /api/v4/redirect_location","description":"Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.\n\n","status":"published","published":"2023-11-06T15:48:23.59Z","modified":"2026-10-28T02:30:49.610350356Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:44:36.851042Z"},{"id":"GHSA-w496-f5qq-m58j","title":"Mattermost vulnerable to excessive memory consumption","description":"Mattermost fails to properly sanitize the request to `/api/v4/redirect_location` allowing an attacker, sending a specially crafted request to `/api/v4/redirect_location`, to fill up the memory due to caching large items.\n\n","status":"published","published":"2023-11-06T18:30:19Z","modified":"2023-11-23T01:40:53Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:58.04805Z"}]}}