Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie's anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user's in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.
History

Fri, 25 Sep 2026 05:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Verbb
Verbb formie
Vendors & Products Verbb
Verbb formie

Wed, 23 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Description Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie's anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user's in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.
Title Formie: Unauthenticated users can overwrite incomplete submissions via submit action
Weaknesses CWE-639
CWE-862
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-09-23T18:35:45.304Z

Updated: 2026-09-24T14:12:18.128Z

Reserved: 2026-08-18T21:17:32.200Z

Link: CVE-2026-76087

cve-icon Vulnrichment

Updated: 2026-09-24T14:12:13.323Z

cve-icon NVD

Status : Deferred

Published: 2026-09-23T19:19:14.570

Modified: 2026-09-30T17:32:07.107

Link: CVE-2026-76087

cve-icon Redhat

No data.