EUVD-2026-47878
GHSA-xr57-33vw-pgmj
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Unauthenticated network injection (AV:N/AC:L/PR:N), but the stored payload fires only when a victim views the page (UI:R); scope change with low C/I reflects script execution in victims' browser context, no availability impact.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The FormCraft plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '[parameter name]' parameter in all versions up to, and including, 3.9.14 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit chain combines a server-side gap - where composite matrix sub-field keys such as field2_0 and field2_1 are never passed through the sanitization loop and are stored raw via $wpdb->insert() - with a client-side gap where DOMPurify is only invoked when typeof field.value === 'string', but matrix values arrive from the server as arrays, bypassing the check before being mapped to strings and injected into the DOM. Additionally, the same sink is reachable via a second attack vector: array-typed field values are passed through htmlentities() on submission but later reversed by html_entity_decode() at formcraft-main.php:2608 and :2122, restoring the malicious payload before storage and rendering.
Articles & Coverage 2
AnalysisAI
Stored cross-site scripting in the FormCraft WordPress plugin (all versions through 3.9.14) lets unauthenticated attackers persist malicious JavaScript that executes in any user's browser when an affected page is rendered. The flaw stems from a two-sided sanitization gap: composite matrix sub-field keys (e.g. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target WordPress site to run FormCraft 3.9.14 or earlier with a form that uses composite matrix fields (the sub-field keys such as field2_0/field2_1 that never enter the sanitization loop) or array-typed field values that pass through the htmlentities()/html_entity_decode() round-trip at formcraft-main.php:2608 and :2122. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N, base 7.2) indicates a network-reachable, low-complexity, unauthenticated attack with a scope change reflecting script execution against users separate from the injecting attacker - consistent with stored XSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker submits a FormCraft form containing a composite matrix field whose sub-field value carries a JavaScript payload as an array, bypassing both the server-side sanitization loop and the client-side DOMPurify string check so it is stored raw. When an administrator later opens the form entry or a page rendering that submission, the script executes in their authenticated browser session, enabling session hijacking or admin-account takeover. … |
| Remediation | Update FormCraft to a release later than 3.9.14 once the vendor publishes a fixed build; no exact patched version is confirmed in the available data, so consult the vendor changelog at https://formcraft-wp.com/changelog/ and the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/6b30089a-2267-47b9-b0a5-d6eeadfe51d2?source=cve to identify the corrected release. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, inventory all WordPress installations to identify FormCraft deployments and assess whether the plugin is business-critical. …
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External POC / Exploit Code
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