CVE-2026-37503

MEDIUM EPSS 9.0%
Published May 1, 20262mo ago · Modified Jun 17, 20262w ago
4.8 CVSS 3.1
Medium
Find Similar
Published May 1, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
4.8
Exploitability
1.7
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
9.0% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
v2boardv2board* ≤1.7.4

References 2

  • gist.github.com https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9
    ExploitThird Party Advisory
  • github.com https://github.com/v2board/v2board
    Product

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.