{"action":"Upgrade github.com/mattermost/mattermost-server to 4.1.2-0.20171013141717-ee57a5829ab1 or later.","affected":[{"fixed":"4.1.2-0.20171013141717-ee57a5829ab1","introduced":"0"},{"fixed":"4.2.1-0.20171013140502-b3e4b0ac9168","introduced":"4.2.0"},{"fixed":"4.3.0","introduced":"4.3.0-rc1"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18873"],"ecosystem":"Go","epss":0.01106,"exploited":false,"fixed_versions":["4.1.2-0.20171013141717-ee57a5829ab1","4.2.1-0.20171013140502-b3e4b0ac9168","4.3.0"],"ghsa_id":"GHSA-x6mw-hf2j-vqpc","id":"tcs_01M5KFRQRK1FDBEVTS8GYWBW5N","modified_at":"2026-02-26T18:56:01.453798Z","published_at":"2022-05-24T17:21:03Z","references":["https://osv.dev/vulnerability/GHSA-x6mw-hf2j-vqpc","https://nvd.nist.gov/vuln/detail/CVE-2017-18873","https://github.com/mattermost/mattermost/commit/9adaf53e110e0e806b21903111aacb93129668cb","https://github.com/mattermost/mattermost/commit/b3e4b0ac91682093276a653f7ccd5774aaa9cd06","https://github.com/mattermost/mattermost/commit/ee57a5829ab162859e0e355dac6cfe6ca1a8f379","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-x6mw-hf2j-vqpc","url":"https://osv.dev/vulnerability/GHSA-x6mw-hf2j-vqpc"}],"summary":"Mattermost Server is vulnerable to channel invisibility DoS via misformatted post"}