{"id":"CVE-2023-1776","aliases":["BIT-mattermost-2023-1776","EUVD-2023-0891","GHSA-63f2-6959-2pxj"],"status":"published","title":"Stored XSS via SVG attachment on Boards","description":"Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the 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Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1776","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-63f2-6959-2pxj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1776.json","tags":["advisory"]},{"url":"https://github.com/mattermost/mattermost-server","tags":["package"]},{"url":"https://mattermost.com/security-updates","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2023-1776","title":"Stored XSS via SVG attachment on Boards","description":"Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the 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to the file. \n\n[Issue Identifier](https://mattermost.com/security-updates/): MMSA-2023-00139","status":"published","published":"2023-03-31T12:30:16Z","modified":"2023-04-07T21:22:42Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:36:50.476488Z"}],"nvd":[{"id":"CVE-2023-1776","description":"Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.\n\n\n","status":"published","published":"2023-03-31T12:15:06.75Z","modified":"2026-06-17T05:28:44.02Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:51.883939Z"}],"osv":[{"id":"CVE-2023-1776","title":"Stored XSS via SVG attachment on Boards","description":"Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.\n\n\n","status":"published","published":"2023-03-31T11:29:36.185Z","modified":"2026-10-28T02:30:37.649281819Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:30.334753Z"},{"id":"GHSA-63f2-6959-2pxj","title":"Mattermost vulnerable to cross-site scripting (XSS)","description":"Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file. \n\n[Issue Identifier](https://mattermost.com/security-updates/): MMSA-2023-00139","status":"published","published":"2023-03-31T12:30:16Z","modified":"2023-12-06T01:02:47.962688Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:38.911014Z"},{"id":"BIT-mattermost-2023-1776","description":"Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.","status":"published","published":"2024-03-06T11:02:23.891Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}