{"id":"CVE-2018-21250","details":"An issue was discovered in Mattermost Server before 5.2.2, 5.1.2, and 4.10.4. It allows remote attackers to cause a denial of service (memory consumption) via crafted image dimensions.","modified":"2026-04-11T21:31:54.497161Z","published":"2020-06-19T17:15:12.427Z","references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"a3843921ae3d45cc7603ffa3e2f7e9014de119bf"},{"introduced":"54994502241bf40bebd9a9d7719c58f708aef5b1"},{"fixed":"b5d5504ad3440d4005a2710f6e45ae989b0a49d3"},{"introduced":"43483805eabcb36ef9018f12a82a6d3ac055baf5"},{"fixed":"536fa89c508ac007cb25139728035b1820eb36a0"}],"database_specific":{"source":"CPE_FIELD","cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.10.4"},{"introduced":"5.1.0"},{"fixed":"5.1.2"},{"introduced":"5.2.0"},{"fixed":"5.2.2"}]}}],"versions":["v0.5.0","v4.10.0","v4.10.0-rc1","v4.10.0-rc2","v4.10.0-rc3","v4.10.0-rc4","v4.10.0-rc5","v4.10.1","v4.10.1-rc1","v4.10.2","v4.10.2-rc1","v4.10.3","v4.10.3-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","v5.1.0","v5.1.0-rc4","v5.1.1","v5.1.1-rc1","v5.2.0","v5.2.0-rc5","v5.2.0-rc6","v5.2.1","v5.2.1-rc1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-21250.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}