{"id":"CVE-2025-13523","summary":"Cross-Site Scripting (XSS) via Unescaped Display Names in Mattermost Confluence Plugin OAuth2 Flow","details":"Mattermost Confluence plugin version \u003c1.7.0 fails to properly escape user-controlled display names in HTML template rendering which allows authenticated Confluence users with malicious display names to execute arbitrary JavaScript in victim browsers via sending a specially crafted OAuth2 connection link that, when visited, renders the attacker's display name without proper sanitization. Mattermost Advisory ID: MMSA-2025-00557","aliases":["GHSA-ffx7-34p2-vm3w","GO-2026-4456"],"modified":"2026-08-12T03:51:13.029478805Z","published":"2026-02-06T15:52:31.003Z","related":["SUSE-SU-2026:0757-1","openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13523.json","cna_assigner":"Mattermost","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13523.json"},{"type":"ADVISORY","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13523"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost-plugin-confluence"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-plugin-confluence","events":[{"introduced":"6435ef5e57631985c373e55df904231acdda236f"},{"fixed":"71947f6e2cfc7535a1660b6b2971217663b47133"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:confluence:*:*:*:*:*:mattermost:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.7.0"},{"introduced":"1.0.0"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v1.6.0-rc1","v1.6.0","v1.5.0-rc3","v1.5.0","v1.5.0-rc2","v1.5.0-rc1","v1.4.0-rc1","v1.3.0","v1.2.0","v1.1.0","v1.1.0-rc1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-13523.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N"}]}