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 saveThemeConfig API. All site visitors execute the payload, enabling cookie theft, session hijacking, or phishing.

CVSS v3 6.9 MEDIUM

6.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9	Exploit Third Party Advisory
https://github.com/v2board/v2board	Product

Configurations

Configuration 1 (hide)

cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-01 16:16

Updated : 2026-06-17 10:41

NVD link : CVE-2026-37503

Mitre link : CVE-2026-37503

CVE.ORG link : CVE-2026-37503

JSON object : View

Products Affected

v2board

v2board

CWE

CWE-79

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

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