CVE-2025-23041: umbraco forms Input Validation Flaw

Description

Umbraco.Forms is a web form framework written for the nuget ecosystem. Character limits configured by editors for short and long answer fields are validated only client-side, not server-side. This issue has been patched in versions 8.13.16, 10.5.7, 13.2.2, and 14.1.2. Users are advised to upgrade. There are no known workarounds for this issue.

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CVSS v3.1 Score

5.8

MEDIUM

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

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
umbraco	umbraco_forms	< 8.13.15
umbraco	umbraco_forms	10.0.0 — 10.5.7
umbraco	umbraco_forms	13.0.0 — 13.2.2
umbraco	umbraco_forms	14.0.0 — 14.1.2

References

Advisories & Patches

https://github.com/umbraco/Umbraco.Forms.Issues/security/advisories/GHSA-9v8m-qv22-f268

Frequently Asked Questions

What is CVE-2025-23041? +

Umbraco.Forms is a web form framework written for the nuget ecosystem. Character limits configured by editors for short and long answer fields are validated only client-side, not server-side. This issue has been patched in versions 8.13.16, 10.5.7, 13.2.2, and 14.1.2. Users are advised to upgrade. There are no known workarounds for this issue. It has a CVSS v3.1 base score of 5.8 (MEDIUM).

How severe is CVE-2025-23041? +

CVE-2025-23041 has a CVSS v3.1 score of 5.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-23041? +

CVE-2025-23041 affects products from umbraco, specifically: umbraco_forms. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-23041? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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