{"id":"CVE-2026-37503","details":"Cross-Site Scripting (XSS) in V2Board thru 1.7.4. The custom_html field in theme configuration is rendered using Blade unescaped output in public/theme/v2board/dashboard.blade.php. An admin can inject arbitrary JavaScript via the saveThemeConfig API. All site visitors execute the payload, enabling cookie theft, session hijacking, or phishing.","modified":"2026-07-15T01:48:51.506191477Z","published":"2026-05-01T00:00:00Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/37xxx/CVE-2026-37503.json","cna_assigner":"mitre"},"references":[{"type":"WEB","url":"https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/37xxx/CVE-2026-37503.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-37503"},{"type":"PACKAGE","url":"https://github.com/v2board/v2board"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/v2board/v2board","events":[{"introduced":"0"},{"last_affected":"0ca47622a50116d0ddd7ffb316b157afb57d25e8"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"1.7.4"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:*"}}],"versions":["1.7.4","1.7.3","1.7.2","1.7.1","1.7.0","1.6.1","1.6.0","1.5.5","1.5.4","1.5.3","1.5.2","1.5.1","1.5.0","1.4.3","1.4.2","1.4.1","1.4","1.3.2","1.3.1","1.3","1.2.5","1.2.4","1.2.3","1.2.2","1.2.1","1.2","1.1.2","1.1.1","1.1","1.0.3","1.0.2","1.0.1","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-37503.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R"}]}