Arbitrary file upload in Maykinmedia Open Forms
CVE-2022-31041
Open Forms is an application for creating and publishing smart forms. Open Forms supports file uploads as one of the form field types. These fields can be configured to allow only certain file extensions to be uploaded by end users (e.g. only PDF / Excel / ...). The input validation of uploaded files is insufficient in versions prior to 1.0.9 and 1.1.1. Users could alter or strip file extensions to bypass this validation. This results in files being uploaded to the server that are of a different file type than indicated by the file name extension. These files may be downloaded (manually or automatically) by staff and/or other applications for further processing. Malicious files can therefore find their way into internal/trusted networks. Versions 1.0.9 and 1.1.1 contain patches for this issue. As a workaround, an API gateway or intrusion detection solution in front of open-forms may be able to scan for and block malicious content before it reaches the Open Forms application.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.008 (54.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Maykinmedia Open Forms — versions 1.1.0
- Open-Formulieren Open-Forms — versions < 1.0.9, >= 1.1.0-rc0, < 1.1.1
Weakness classification (CWE)
References
- github.com/open-formulieren/open-forms/security/advisories/GHSA-h85r-xv4w-cg8g (Third Party Advisory)
- github.com/open-formulieren/open-forms/commit/0978a29e821a7228c5d46c0527c3e925e… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-31041?
- CVE-2022-31041 is a high-severity vulnerability in Maykinmedia Open Forms, classified under Improper Input Validation. CVSS score: 7.6/10. Published 2022-06-13.
- How severe is CVE-2022-31041?
- High severity. CVSS v3 base score is 7.6 out of 10.