CVE-2026-37503

State: Published
Severity: 6.9 Medium
Published: May 1, 2026
Updated: May 1, 2026
Reserved: Apr 6, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.9 Medium	CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R	mitre

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/v2board/v2board
https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9

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