CVE-2026-45697 PUBLISHED

Formie: Pre-authenticated server-side template injection in Hidden fields

Assigner: GitHub_M
Reserved: 13.05.2026 Published: 29.05.2026 Updated: 29.05.2026

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.20 and 3.1.24, unauthenticated users could submit crafted values into Hidden fields (with Default value → Custom) that were evaluated as Twig during submission handling, which could lead to serious compromise of the Craft site (depending on template/sandbox behavior). This vulnerability is fixed in 2.2.20 and 3.1.24.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	verbb
Product	formie
Versions	Version < 2.2.20 is affected Version >= 3.0.0-beta.1, < 3.1.24 is affected

References

Problem Types

CWE-94: Improper Control of Generation of Code ('Code Injection') CWE
CWE-693: Protection Mechanism Failure CWE
CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine CWE