CVE-2026-37503
Cross-Site Scripting (XSS) in V2Board thru 1.7.4. The custom_html field in theme configuration is...
CVE-2026-37503 is a medium vulnerability (CVSS 6.9) in V2board, published May 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 8th percentile. No source names a fixed version.
- Severity
- 6.9 MediumCVSS 3.1, CVE List
- Exploit chance
- 0.19%EPSS, 8th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- None
Exploit likelihood
Affected products
What each source reports
CVE List Score used
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.
- Record
CVE-2026-37503- CVSS 3.1
- 6.9 Medium
CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2026-26667
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.
- Record
EUVD-2026-26667- CVSS 3.1
- 6.9 Medium
CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4jxj-79x3-676q
Cross-Site Scripting (XSS) in V2Board thru 1.7.4. The custom_html field in theme configuration is...
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.
- Record
GHSA-4jxj-79x3-676q- CVSS 3.1
- 6.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-37503- CVSS 3.1
- 6.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N - CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-12
OSV
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.
- Record
CVE-2026-37503- CVSS 3.1
- 6.9 Medium
CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:C/UI:R - Updated
- 2026-11-13
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | NVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.