TI-2026-28053 Aliases CVE-2026-37503 GHSA-4jxj-79x3-676q

Cross-Site Scripting (XSS) in V2Board thru 1.7.4.

LOW 30CWE-79Published 2026-05-01 · Updated 2026-05-01

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00191 8th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:v2board:v2board::::::::	up to 1.7.4	Vulnerable	v2board

cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:* Versions up to 1.7.4 Vulnerable ·v2board

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-37503
2026-10-03 Alias added: GHSA-4jxj-79x3-676q

References

Exploit 1

https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9

Other 1

https://github.com/v2board/v2board

TI-2026-28054 Sensitive server_token exposed via GET parameter in V2Board thru 1.7.4. CVSS 3.1HIGH 7.5
TI-2026-28055 SQL Injection via ORDER BY clause in V2Board thru 1.7.4. CVSS 3.1MEDIUM 4.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences