{"id":"CVE-2017-18898","details":"An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows crafted posts that potentially cause a web browser to hang.","aliases":["GHSA-9589-mq83-f749","GO-2026-4300"],"modified":"2026-04-10T03:58:19.810608Z","published":"2020-06-19T19:15:11.373Z","related":["SUSE-SU-2026:0142-1"],"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"0"},{"fixed":"ff513427371cd84e07b19c0586d419dbed976b31"},{"introduced":"0033e3e37b12cb5d951d21492500d66a6abc472b"},{"fixed":"5549c9149e80537d0f431b6b3ebf638c35568c4f"},{"introduced":"0"},{"last_affected":"f968c56890bd84295672ee0d46cc846cac2dbd47"},{"introduced":"0"},{"last_affected":"7018c187e13be731e4e8dc36b731b07128f030fa"},{"introduced":"0"},{"last_affected":"f4146835fe37856c0e109b819328772fa104ad80"},{"introduced":"0"},{"last_affected":"a5ce36d0882ae1b4b409a7b68233bf89591a5f95"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"4.0.5"},{"introduced":"4.1.0"},{"fixed":"4.1.1"},{"introduced":"0"},{"last_affected":"4.2.0-rc1"},{"introduced":"0"},{"last_affected":"4.2.0-rc2"},{"introduced":"0"},{"last_affected":"4.2.0-rc3"},{"introduced":"0"},{"last_affected":"4.2.0-rc4"}]}}],"versions":["v0.5.0","v4.0.0","v4.0.1","v4.0.2","v4.0.3","v4.0.4","v4.0.4-rc1","v4.1.0","v4.2.0","v4.2.0-rc1","v4.2.0-rc2","v4.2.0-rc3","v4.2.0-rc4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18898.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:L"}]}