What is CVE-2026-37503?

CVE-2026-37503 is a medium-severity vulnerability in V2board, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-05-01.

How severe is CVE-2026-37503?

Medium severity. CVSS v3 base score is 6.9 out of 10.

XSS in V2board

CVE-2026-37503

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 saveTheme…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N.

Affected products

V2board
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-37503?: CVE-2026-37503 is a medium-severity vulnerability in V2board, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-05-01.
How severe is CVE-2026-37503?: Medium severity. CVSS v3 base score is 6.9 out of 10.