{"id":"CVE-2026-84434","title":"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","summary":"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 persis…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-434"],"vendor":"Gravity Forms","product":"Gravity Forms","affected":["gravity_forms <= 3.1.0.4"],"published":"2026-09-19","updated":"2026-09-21","sourceUpdated":"2026-09-21T13:33:33.387","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84434","references":[{"url":"https://docs.gravityforms.com/gravityforms-change-log/","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/787e22a9-329b-4e71-bc2a-4f5524fc9356?source=cve","label":"security@wordfence.com"}],"tags":["nvd","exploit-available","cve.org"],"epss":0.00697,"epssPercentile":0.51214,"exploits":{"github":1,"githubRepos":["https://github.com/murrez/CVE-2026-84434"],"nuclei":["CVE-2026-84434"],"checkedAt":"2026-09-21T13:37:57.317Z"},"exploitAvailable":true,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-19T13:22:34.707717Z"},"ingestedAt":"2026-09-19T02:56:32.978Z","slug":"CVE-2026-84434","body":"## Overview\n\nThe 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 unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. Exploitation requires the targeted form to contain a File Upload field with its Visibility set to 'Hidden'; the vulnerability is reachable by unauthenticated attackers on any publicly accessible form meeting this condition.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":208185,"id":"CVE-2026-84434","ts":1789926921221,"field":"exploit_available","old":"false","new":"true"}]}