CVE-2026-37503

Cross-Site Scripting (XSS) in V2Board thru 1.7.4

Medium · published May 1, 2026

CVSS v3.1
6.9
EPSS
0%
Percentile
20.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.9 · MEDIUM
Vector
CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R
CVSS v4.0
Not supplied
EPSS
0.00288 · 20.3th percentile
Published
2026-05-01T00:00Z
EPSS history
Timeline
  • 01 MAY 00:00Z
    Cross-Site Scripting (XSS) in V2Board thru 1.7.4
    cvelistv5