CVE-2026-37503

FAUCET Score

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.

First published: May 1, 2026Last modified: May 1, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 1.7.4CPE matchmatch criteria	cpe:2.3:a:v2board:v2board::::::::

CVSS Data

CVSS version used by this source: 3.1

6.9MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

1.7

Impact Score

4.7

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.19%

Probability of exploitation in next 30 days

EPSS Percentile

9.1%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0019 is in the 5th percentile among its peer group of 4,931 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gist.github.com / sgInnora/1330e1a82caa79906eec55eeff2c99b9

ExploitThird Party Advisory

github.com / v2board/v2board

Product