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.

PUBLISHED Reserved 2026-04-06 | Published 2026-05-01 | Updated 2026-05-01 | Assigner mitre

References

github.com/v2board/v2board

gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9

cve.org (CVE-2026-37503)

nvd.nist.gov (CVE-2026-37503)

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