{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-100155", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-09-25T12:17:34.300Z", "datePublished": "2026-10-31T05:33:08.113Z", "dateUpdated": "2026-10-31T05:33:08.113Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-10-31T05:33:08.113Z"}, "affected": [{"vendor": "kstover", "product": "Ninja Forms \u2013 Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "3.15.5", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The The Ninja Forms \u2013 Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes."}], "title": "Ninja Forms <= 3.15.5 - Unauthenticated Arbitrary Shortcode Execution via 'formData' Field Value via Success Message Merge Tag", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a1cf42f7-77c6-4594-a6a4-cebf5c3558d7?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Actions/SuccessMessage.php#L63"}, {"url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Actions/SuccessMessage.php#L70"}, {"url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/AJAX/Controllers/Submission.php#L52"}, {"url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Abstracts/MergeTags.php#L64"}, {"url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/MergeTags/Fields.php#L268"}, {"url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/AJAX/Controllers/Submission.php#L60"}, {"url": "https://wordpress.org/plugins/ninja-forms/"}, {"url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3749135%40ninja-forms%2Ftags%2F3.15.6&old=3717122%40ninja-forms%2Ftags%2F3.15.5"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-94 Improper Control of Generation of Code", "cweId": "CWE-94", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM"}}], "credits": [{"lang": "en", "type": "finder", "value": "Kuba"}], "timeline": [{"time": "2026-09-25T12:32:38.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-10-30T17:25:47.000Z", "lang": "en", "value": "Disclosed"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Ninja Forms \u2013 Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder", "vendor": "kstover", "versions": [{"lessThanOrEqual": "3.15.5", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The The Ninja Forms \u2013 Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes."}], "id": "CVE-2026-100155", "lastModified": "2026-10-31T06:16:29.350", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-10-31T06:16:29.350", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/AJAX/Controllers/Submission.php#L52"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/AJAX/Controllers/Submission.php#L60"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Abstracts/MergeTags.php#L64"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Actions/SuccessMessage.php#L63"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Actions/SuccessMessage.php#L70"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/MergeTags/Fields.php#L268"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3749135%40ninja-forms%2Ftags%2F3.15.6&old=3717122%40ninja-forms%2Ftags%2F3.15.5"}, {"source": "security@wordfence.com", "url": "https://wordpress.org/plugins/ninja-forms/"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a1cf42f7-77c6-4594-a6a4-cebf5c3558d7?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}

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