{"id":"CVE-2026-67187","state":"PUBLISHED","title":"Ninja Forms WordPress Plugin < 3.15.4 Server-Side Validation Bypass via List Fields","description":"Ninja Forms plugin for WordPress before 3.15.4 contains an incomplete server-side validation vulnerability that allows unauthenticated attackers to submit arbitrary values to Checkbox List, Multi-Select List, Image List, Country, and State fields because NF_Abstracts_List falls through to a validate() method that only checks required-field presence. Attackers can submit crafted formula payloads through the unauthenticated nf_ajax_submit endpoint that bypass CSV escaping applied only to Textbox and Textarea fields, resulting in CSV injection when an administrator downloads and opens the exported submissions file.","publishedAt":"2026-10-28T15:19:16.649Z","updatedAt":"2026-10-28T15:19:16.649Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L","source":"VulnCheck"},"assigner":"VulnCheck","products":["Saturday Drive Ninja Forms"],"affected":[{"vendor":"Saturday Drive","product":"Ninja Forms","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.15.4","versionType":"semver"}]}],"references":["https://wordpress.org/plugins/ninja-forms/#developers","https://www.vulncheck.com/advisories/ninja-forms-wordpress-plugin-server-side-validation-bypass-via-list-fields"],"weaknesses":["CWE-1236"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67187.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67187","state":"PUBLISHED","datePublished":"2026-10-28T15:19:16.649Z","dateUpdated":"2026-10-28T15:19:16.649Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-28T16:06:49.773Z"},"containers":{"cna":{"title":"Ninja Forms WordPress Plugin < 3.15.4 Server-Side Validation Bypass via List Fields","descriptions":[{"lang":"en","value":"Ninja Forms plugin for WordPress before 3.15.4 contains an incomplete server-side validation vulnerability that allows unauthenticated attackers to submit arbitrary values to Checkbox List, Multi-Select List, Image List, Country, and State fields because NF_Abstracts_List falls through to a validate() method that only checks required-field presence. Attackers can submit crafted formula payloads through the unauthenticated nf_ajax_submit endpoint that bypass CSV escaping applied only to Textbox and Textarea fields, resulting in CSV injection when an administrator downloads and opens the exported submissions file."}],"affected":[{"vendor":"Saturday Drive","product":"Ninja Forms","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.15.4","versionType":"semver"}]}],"references":[{"url":"https://wordpress.org/plugins/ninja-forms/#developers","name":"WordPress Plugin Changelog","tags":["release-notes","patch"]},{"url":"https://www.vulncheck.com/advisories/ninja-forms-wordpress-plugin-server-side-validation-bypass-via-list-fields","name":"VulnCheck Advisory: Ninja Forms WordPress Plugin < 3.15.4 Server-Side Validation Bypass via List Fields","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"LOW","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.1,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW","version":"3.1","baseSeverity":"HIGH","baseScore":7.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1236","lang":"en","description":"Improper Neutralization of Formula Elements in a CSV File","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-28T15:19:16.649Z"},"tags":["x_open-source"],"datePublic":"2026-09-21T00:00:00.000Z","credits":[{"lang":"en","value":"Choriyev Qahramon (ciprobe)","type":"finder"}],"x_generator":{"engine":"vulncheck"}}}}}