{"id":"CVE-2023-1777","aliases":["BIT-mattermost-2023-1777","GHSA-3wq5-3f56-v5xc"],"url":"https://o3.security/vulnerability/CVE-2023-1777","summary":"Information disclosure in linked message previews","details":"Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.\n\n","published":"2023-03-31T11:35:22.813Z","modified":"2026-08-27T03:31:07.329554223Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","fixedVersion":"7.1.6"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"7.8.1"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"7.7.2"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"7.1.6"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","fixedVersion":"6.0.0-20230301145909-10be118d99a5"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"1.4.1-0.20230301145909-10be118d99a5"}],"fix":null,"references":[{"type":"WEB","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1777.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1777"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T03:31:07.329554223Z"}}