AIKIDO-2026-247839
Gravity Forms is vulnerable to Unrestricted File Upload
98
CVE Score
Critical
Unrestricted File Upload
TL;DR
upload_file() persists a submitted file after the field validation pipeline has already run. Hidden File Upload fields skip extension checks, and a rejected upload's intact file state is later passed to upload_file() without being validated again. An unauthenticated visitor to a public form can therefore store an executable file and achieve remote code execution. The fix re-validates hidden File Upload fields before the file is persisted.
How do I fix this?
Upgrade the gravityforms and/or the Gravity Forms library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and a publicly accessible form contains a File Upload field with Visibility set to Hidden.
Package
Versions
0.0.1 - 3.1.0.4
Fixed in 3.1.1Background info
Gravity Forms is vulnerable to Unrestricted File Upload in versions 0.0.1 - 3.1.0.4.
Links
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