by Kastro
Paper/Archive/CVE-2026-45697

CVE-2026-45697

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

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 41.1.411 × 208.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
formie< 2.2.20–CNA
formie>= 3.0.0-beta.1, < 3.1.24–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/verbb/formie/security/advisories/GHSA-x7m9-mwc2-g6w2refgithub.com/verbb/formie/commit/f690d5623163ce2a95da305238d6367575486ee3refgithub.com/verbb/formie/releases/tag/2.2.20refgithub.com/verbb/formie/releases/tag/3.1.24