Unauthorized Submission Modification in Craft CMS Plugin by Verbb
CVE-2026-47266

8.7HIGH

Key Information:

Vendor

Verbb

Status
Formie
Vendor
CVE Published:
29 May 2026

What is CVE-2026-47266?

The Formie plugin for Craft CMS is prone to a vulnerability that allows unauthenticated users to modify existing form submissions. This occurs when users post a known or guessed submission ID, which can be exploited through the endpoint formie/submissions/save-submission. This issue has been addressed in versions 2.2.21 and 3.1.26, where necessary protections have been implemented to prevent unauthorized access.

Affected Version(s)

formie < 2.2.21 < 2.2.21

formie >= 3.0.0-beta.1, < 3.1.26 < 3.0.0-beta.1, 3.1.26

References

https://github.com/verbb/formie/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/verbb/formie/releases/tag/2.2.21
x_refsource_MISC
https://github.com/verbb/formie/releases/tag/3.1.26
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.