CVE-2026-45697 (GCVE-0-2026-45697)

Vulnerability from cvelistv5 – Published: 2026-05-29 19:01 – Updated: 2026-05-29 19:01
VLAI
Title
Formie: Pre-authenticated server-side template injection in Hidden fields
Summary
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.
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-693 - Protection Mechanism Failure
  • CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
Impacted products
Vendor Product Version
verbb formie Affected: < 2.2.20
Affected: >= 3.0.0-beta.1, < 3.1.24
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "formie",
          "vendor": "verbb",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.2.20"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-beta.1, \u003c 3.1.24"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u2192 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": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1336",
              "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-29T19:01:49.220Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/verbb/formie/security/advisories/GHSA-x7m9-mwc2-g6w2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/verbb/formie/security/advisories/GHSA-x7m9-mwc2-g6w2"
        },
        {
          "name": "https://github.com/verbb/formie/commit/f690d5623163ce2a95da305238d6367575486ee3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/verbb/formie/commit/f690d5623163ce2a95da305238d6367575486ee3"
        },
        {
          "name": "https://github.com/verbb/formie/releases/tag/2.2.20",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/verbb/formie/releases/tag/2.2.20"
        },
        {
          "name": "https://github.com/verbb/formie/releases/tag/3.1.24",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/verbb/formie/releases/tag/3.1.24"
        }
      ],
      "source": {
        "advisory": "GHSA-x7m9-mwc2-g6w2",
        "discovery": "UNKNOWN"
      },
      "title": "Formie: Pre-authenticated server-side template injection in Hidden fields"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-45697",
    "datePublished": "2026-05-29T19:01:49.220Z",
    "dateReserved": "2026-05-13T04:38:01.165Z",
    "dateUpdated": "2026-05-29T19:01:49.220Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-45697\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-05-29T20:16:27.393\",\"lastModified\":\"2026-05-29T20:21:38.773\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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 \u2192 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\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-94\"},{\"lang\":\"en\",\"value\":\"CWE-693\"},{\"lang\":\"en\",\"value\":\"CWE-1336\"}]}],\"references\":[{\"url\":\"https://github.com/verbb/formie/commit/f690d5623163ce2a95da305238d6367575486ee3\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/verbb/formie/releases/tag/2.2.20\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/verbb/formie/releases/tag/3.1.24\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/verbb/formie/security/advisories/GHSA-x7m9-mwc2-g6w2\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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