PatchTheCVECVE-2026-84434: The Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and inclu
CVE-2026-84434 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.1.0.4 via the upload_file function. This is due to a mismatch between the field validation pipeline and the file persistence pipeline, where hidden file upload fields bypass extension validation and a rejected file's intact upload state is later passed to upload_file() without re-validation. This makes it possible for unauthentica
Why this priority
- Critical severity
- EPSS top 10%: very likely to be exploited
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 3.9% (top 10%) |
| CISA exploited list | No |
| Weakness | CWE-434 |
| Published | 2026-09-19 |
| Last modified | 2026-09-21 |
Last updated 2026-09-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: murrez/CVE-2026-84434 (0 stars)
- Nuclei scan template: WordPress Gravity Forms Plugin <=3.1.0.4 - Unauthenticated Arbitrary File Upload
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-84434?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-84434 being exploited?
CVE-2026-84434 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-84434 affect?
CVE-2026-84434 affects affected software. Severity is critical (CVSS 9.8). The Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.1.0.4 via the upload_file function. This is due to a mismatch between the field validation pipeline and the file persisten
How urgent is CVE-2026-84434?
Priority 65/100. Critical severity; EPSS top 10%: very likely to be exploited; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action