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CVE-2026-37503

MEDIUM
4.8
CVSS Score
Published: May 1, 2026 at 12:00 AM UTC
Updated: June 17, 2026 at 10:41 AM UTC
1 product affected across 1 vendorV2BOARD

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

V2BOARD· V2BOARD
95%
v ≤ 1.7.4

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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