{"id":"CVE-2023-1421","aliases":["BIT-mattermost-2023-1421","EUVD-2023-23674","GHSA-mq63-cgjw-m94m"],"status":"published","title":"Reflected XSS in OAuth flow completion endpoints","description":"A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.","severity":{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00413,"percentile":0.36046,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2023-03-15T22:51:25Z","modified":"2026-10-28T02:30:35Z","fixes":[{"ecosystem":"Bitnami","package":"mattermost","fixed_in":["7.7.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mattermost","ranges":[{"type":"SEMVER","events":[{"introduced":"5.32.0"},{"fixed":"7.7.0"}]}]}],"products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates/","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1421","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-mq63-cgjw-m94m"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1421.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-1421","title":"Reflected XSS in OAuth flow completion endpoints","description":"A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.","status":"published","published":"2023-03-15T22:51:25.597Z","modified":"2024-12-06T23:06:14.595Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:32.376766Z"}],"euvd":[{"id":"EUVD-2023-23674","description":"A reflected cross-site scripting vulnerability in 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parameter.","status":"published","published":"2023-03-16T00:32:43Z","modified":"2023-03-30T05:09:21Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:54:25.211321Z"}],"nvd":[{"id":"CVE-2023-1421","description":"A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state 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parameter.","status":"published","published":"2023-03-15T22:51:25.597Z","modified":"2026-10-28T02:30:35.329734259Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:29.487253Z"},{"id":"BIT-mattermost-2023-1421","description":"A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.","status":"published","published":"2024-03-06T11:02:50.481Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}