{"id":"CVE-2023-40703","details":"Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted string. \n\n","aliases":["GHSA-c37r-v8jx-7cv2"],"modified":"2026-04-09T09:43:22.578858Z","published":"2023-11-27T10:15:07.460Z","related":["CGA-rf23-3r6f-fwww"],"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"0"},{"last_affected":"b69ff7d1038609a4a29a7db104679d21da10ad09"},{"introduced":"90f502dc2dc80ee25cfb7d7bc3e743b53564a5a7"},{"last_affected":"4fe1024a51f22f239c19c33838dbdcf7589b7b94"},{"introduced":"987e843629fe3f11861fda23ceb66884f5973ef1"},{"last_affected":"77f094c7ee8c7a00be01c2df72f948a62c690b66"},{"introduced":"0"},{"last_affected":"5934ff113becf755beb978cc7bd1ba6564cbbdd6"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"7.8.12"},{"introduced":"8.0.0"},{"last_affected":"8.1.3"},{"introduced":"9.0.0"},{"last_affected":"9.0.1"},{"introduced":"0"},{"last_affected":"9.1.0"}]}}],"versions":["@mattermost/client@8.1.1","@mattermost/client@9.0.0","@mattermost/client@9.1.0","@mattermost/types@8.1.1","@mattermost/types@9.0.0","@mattermost/types@9.1.0","cloud-2022-07-20-1","cloud-2022-08-10-1","cloud-2022-09-08-1","cloud-2022-10-06-1","cloud-2022-11-11-1","cloud-2022-11-24-1","cloud-2023-01-26-1","cloud-2023-07-26-1","cloud-2023-09-26-1","server/public/v0.0.5","server/public/v0.0.6","server/public/v0.0.7","server/public/v0.0.8","server/public/v0.0.9","v0.5.0","v4.10.0-rc1","v4.2.0-rc1","v4.3.0-rc1","v4.4.0-rc1","v4.5.0-rc1","v4.6.0-rc1","v4.6.0-rc2","v4.7.0-rc1","v4.8.0-rc1","v4.9.0-rc1","v5.0.0-rc1","v5.1.0-rc1","v5.2.0-rc1","v5.2.0-rc2","v7.8.0","v7.8.1","v7.8.10","v7.8.10-rc3","v7.8.10-rc4","v7.8.10-rc5","v7.8.11","v7.8.11-rc1","v7.8.12","v7.8.12-rc1","v7.8.12-rc2","v7.8.2","v7.8.3","v7.8.4","v7.8.5","v7.8.6","v7.8.7","v7.8.8","v7.8.9","v8.1.0","v8.1.0-rc2","v8.1.1","v8.1.1-rc1","v8.1.1-rc2","v8.1.2","v8.1.2-rc1","v8.1.2-rc2","v8.1.3","v8.1.3-rc1","v8.1.3-rc2","v9.0.0","v9.0.0-rc2","v9.0.1","v9.0.1-rc1","v9.1.0","v9.1.0-rc1","v9.1.0-rc2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-40703.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}