{"schema_version":"1.9.0","id":"GHSA-q66g-q98c-q454","published":"2025-12-17T15:34:53Z","modified":"2026-01-14T20:26:48.145018Z","aliases":["CVE-2025-62690","GO-2025-4248"],"summary":"Mattermost has missing redirect URL validation","details":"Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.","affected":[{"package":{"name":"github.com/mattermost/mattermost/server/v8","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0-20250721062209-4952acea88ce"},{"fixed":"8.0.0-20251016131338-dad6bd7a1509"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-q66g-q98c-q454/GHSA-q66g-q98c-q454.json"}},{"package":{"name":"github.com/mattermost/mattermost","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.11.0-rc1"},{"fixed":"10.11.5-0.20251016131338-dad6bd7a1509"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-q66g-q98c-q454/GHSA-q66g-q98c-q454.json"}},{"package":{"name":"github.com/mattermost/mattermost","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost"},"ranges":[{"type":"SEMVER","events":[{"introduced":"11.0.0-alpha.1"},{"fixed":"11.1.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-q66g-q98c-q454/GHSA-q66g-q98c-q454.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62690"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/dad6bd7a1509054580a0898bbc0e026aac3b30cb"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"cwe_ids":["CWE-601"],"github_reviewed":true,"github_reviewed_at":"2025-12-18T15:25:38Z","nvd_published_at":"2025-12-17T13:15:58Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"}]}