{"id":"CVE-2026-37503","aliases":["EUVD-2026-26667","GHSA-4jxj-79x3-676q"],"status":"published","title":"Cross-Site Scripting (XSS) in V2Board thru 1.7.4. The custom_html field in theme configuration is...","description":"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.","severity":{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00191,"percentile":0.08801,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-05-01T00:00:00Z","modified":"2026-10-28T02:30:29Z","products":[{"vendor":"v2board","product":"v2board"}],"references":[{"url":"https://github.com/v2board/v2board","tags":["Product","package"]},{"url":"https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9","tags":["Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-37503","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4jxj-79x3-676q"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/37xxx/CVE-2026-37503.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-37503","description":"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.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-05-01T19:46:08.026Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:39:16.730222Z"}],"euvd":[{"id":"EUVD-2026-26667","description":"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.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-05-01T19:46:08Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R","level":"medium"}],"updated_at":"2026-11-02T19:05:18.340967Z"}],"ghsa":[{"id":"GHSA-4jxj-79x3-676q","title":"Cross-Site Scripting (XSS) in V2Board thru 1.7.4. The custom_html field in theme configuration is...","description":"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.","status":"published","published":"2026-05-01T18:31:23Z","modified":"2026-05-01T21:32:22Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:07:52.84276Z"}],"nvd":[{"id":"CVE-2026-37503","description":"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.","status":"published","published":"2026-05-01T16:16:30.49Z","modified":"2026-06-17T10:41:33.217Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:17.022502Z"}],"osv":[{"id":"CVE-2026-37503","description":"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.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-10-28T02:30:29.633833163Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R","level":"medium"}],"updated_at":"2026-11-02T15:45:03.040464Z"}]}}