CVE-2026-76087
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| verbb | formie | < 2.2.23 | affected |
| verbb | formie | >= 3.0.0, < 3.1.31 | affected |
Weaknesses
- CWE-639: CWE-639: Authorization Bypass Through User-Controlled Key
- CWE-862: CWE-862: Missing Authorization
References
- https://github.com/verbb/formie/security/advisories/GHSA-584p-f93j-wpgc
- https://github.com/verbb/formie/commit/323c2fe647a76fbccadf749728ee4ad9420efee1
- https://github.com/verbb/formie/commit/78a298ac3baf85ac283988dfce9cd42c9b958f16
- https://github.com/verbb/formie/releases/tag/2.2.23
- https://github.com/verbb/formie/releases/tag/3.1.31
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