{"id":"CVE-2022-3257","aliases":["BIT-mattermost-2022-3257","GHSA-m7w4-q5vg-5xfp"],"url":"https://o3.security/vulnerability/CVE-2022-3257","summary":"Server-side Denial of Service while processing a specifically crafted GIF file","details":"Mattermost version 7.1.x and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.","published":"2022-09-23T14:13:39Z","modified":"2026-07-15T01:49:15.486936797Z","cvss":{"score":3.1,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","fixedVersion":"7.2.0"}],"fix":null,"references":[{"type":"WEB","url":"https://hackerone.com/reports/1620170"},{"type":"WEB","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/3xxx/CVE-2022-3257.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-3257"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:15.486936797Z"}}