Security readout for executives and security teams
Plain-English summary
Open Forms allowed uploaded files to bypass configured extension restrictions before versions 1.0.9 and 1.1.1. A user could make a file appear acceptable by altering or removing its extension, letting unexpected file types reach the server and potentially staff or internal processing systems.
Executive priority
Treat this as a high-priority application hardening issue if Open Forms handles external uploads. The primary risk is malicious content entering trusted workflows, not proven remote compromise from the sources provided. Patch promptly and review upload-processing practices.
Technical view
CVE-2022-31041 is insufficient uploaded-file validation in open-formulieren open-forms. File upload fields could enforce allowed extensions, but validation before 1.0.9 and affected 1.1.0 release candidates could be bypassed by changing or stripping extensions. The issue is classified as CWE-20 and CWE-434 with CVSS 3.1 score 7.6.
Likely exposure
Exposure is likely where Open Forms is internet- or network-accessible, uses file upload fields, and runs versions below 1.0.9 or 1.1.0-rc0 through below 1.1.1. Risk depends on whether uploaded files are later downloaded or processed by staff or internal applications.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The vendor advisory describes a low-complexity network issue requiring low privileges and no user interaction in the CVSS vector, but the business impact depends on downstream handling of uploaded files.
Researcher notes
The evidence supports an upload validation bypass, not arbitrary code execution. The affected ranges are clearly identified, and patches are named. Public sources provided do not establish exploit availability, active exploitation, or specific downstream product impacts beyond unsafe files reaching internal or trusted networks.
Mitigation direction
- Upgrade open-forms to version 1.0.9, 1.1.1, or later.
- Check vendor guidance for any newer supported release recommendations.
- Use an API gateway or IDS to scan and block malicious uploaded content.
- Restrict file upload fields to necessary users and workflows.
- Review staff and application handling of uploaded files.
Validation and detection
- Inventory deployed open-forms versions and compare against affected ranges.
- Identify forms with file upload fields and configured extension allow-lists.
- Confirm patched versions reject mismatched uploaded file content.
- Review historical uploads for unexpected file types before the patch date.
- Verify gateway or IDS scanning is active for upload paths.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-31041 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L2.84.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.6HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/open-formulieren/open-forms/security/advisories/GHSA-h85r-xv4w-cg8gCVE reference · x_refsource_CONFIRM
- https://github.com/open-formulieren/open-forms/commit/0978a29e821a7228c5d46c0527c3e925eb91b071CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.