CVE-2026-87071: CWE-20 Improper Input Validation in Forminator Forms
The Forminator Forms WordPress plugin before 1.57.2.1 does not restrict which metadata keys a form submission may supply, and does not exclude the keys WordPress reserves for its own use, so unauthenticated visitors submitting a public form that collects post content can attach metadata of their choosing to the post their submission creates.
AI Analysis
Technical Summary
The Forminator Forms WordPress plugin versions prior to 1.57.2.1 suffer from improper input validation (CWE-20) where it fails to restrict which metadata keys can be supplied by form submissions. As a result, unauthenticated visitors submitting public forms that collect post content can add arbitrary metadata, including keys reserved by WordPress, to the posts created by their submissions. This could lead to unintended metadata injection affecting post data integrity.
Potential Impact
The vulnerability allows unauthenticated attackers to inject arbitrary metadata into posts created via public form submissions. While it does not impact confidentiality or availability, it can lead to integrity issues by modifying post metadata in unintended ways. There is no indication of active exploitation in the wild.
Mitigation Recommendations
Upgrade the Forminator Forms plugin to version 1.57.2.1 or later, where this issue is fixed. Patch status is confirmed by the version boundary in the affectedVersions field. No other mitigation is indicated.
CVE-2026-87071: CWE-20 Improper Input Validation in Forminator Forms
Description
The Forminator Forms WordPress plugin before 1.57.2.1 does not restrict which metadata keys a form submission may supply, and does not exclude the keys WordPress reserves for its own use, so unauthenticated visitors submitting a public form that collects post content can attach metadata of their choosing to the post their submission creates.
CVSS v3.1
Score 5.3medium
Affected software
Forminator Forms
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Forminator Forms WordPress plugin versions prior to 1.57.2.1 suffer from improper input validation (CWE-20) where it fails to restrict which metadata keys can be supplied by form submissions. As a result, unauthenticated visitors submitting public forms that collect post content can add arbitrary metadata, including keys reserved by WordPress, to the posts created by their submissions. This could lead to unintended metadata injection affecting post data integrity.
Potential Impact
The vulnerability allows unauthenticated attackers to inject arbitrary metadata into posts created via public form submissions. While it does not impact confidentiality or availability, it can lead to integrity issues by modifying post metadata in unintended ways. There is no indication of active exploitation in the wild.
Mitigation Recommendations
Upgrade the Forminator Forms plugin to version 1.57.2.1 or later, where this issue is fixed. Patch status is confirmed by the version boundary in the affectedVersions field. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-08T19:05:03.068Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab3aaf0f7a7c54106a5313d
Added to database: 09/23/2026, 10:33:20 UTC
Last enriched: 09/23/2026, 10:48:08 UTC
Last updated: 09/23/2026, 12:52:59 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.