CVE-2026-24687

Description

Umbraco Forms is a form builder that integrates with the Umbraco content management system. Its possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud runs in a Windows environment, Cloud users arent affected. This issue affects versions 16 and 17 of Umbraco Forms and is patched in 16.4.1 and 17.1.1. If upgrading is not immediately possible, users can mitigate this vulnerability by configuring a WAF or reverse proxy to block requests containing path traversal sequences (../, ..) in the fileName parameter of the export endpoint, restricting network access to the Umbraco backoffice to trusted IP ranges, and/or blocking the /umbraco/forms/api/v1/export endpoint entirely if the export feature is not required. However, upgrading to the patched version is strongly recommended.

Risk Information

Base Score

6.5

MODERATE

Vector

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

EPSS Score

Exploitation Probability

0.023

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2026-24687 are fixed in Nuget - Umbraco.Forms 16.4.1	Windows
Vulnerabilities CVE-2026-24687 are fixed in Nuget - Umbraco.Forms 17.1.1	Windows
Vulnerabilities CVE-2026-24687 are fixed in Nuget - Umbraco.Forms for Linux 16.4.1	Linux
Vulnerabilities CVE-2026-24687 are fixed in Nuget - Umbraco.Forms for Linux 17.1.1	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234