SimpleForm <= 3.10.2 - Unauthenticated Arbitrary File Upload via Trailing-Dot Filename via Unknown File Key in simpleform_get_submit_data
Summary
| CVE | CVE-2026-118235 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-31 09:16:33 UTC |
| Updated | 2026-10-31 09:16:33 UTC |
| Description | The SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.10.2 via the handle_upload function. This is due to missing server-side file key allowlist and pre-sanitization extension derivation that allows a trailing-dot filename to bypass all extension and MIME validation in handle_upload. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The only access control is a nonce that is printed into every public form's data-nonce attribute, making it trivially obtainable by any unauthenticated visitor on a page embedding the form shortcode. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-434 | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Wpazleen | SimpleForm Form Maker To Chat Apps With Quiz Poll And Multi Lead Notifications | affected 3.10.2 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.wordfence.com/threat-intel/vulnerabilities/id/6aac2178-f6ce-4444-9afc-7e014... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/simple-form/tags/3.10.2/app/Ajax/Tables.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/simple-form/tags/3.10.2/app/FileUpload.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/simple-form/tags/3.10.2/app/Ajax/Tables.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/simple-form/tags/3.10.2/app/FileUpload.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/simple-form/tags/3.10.2/app/Ajax/Tables.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.svn.wordpress.org/simple-form/trunk | [email protected] | plugins.svn.wordpress.org | |
| plugins.trac.wordpress.org/browser/simple-form/tags/3.10.2/app/FileUpload.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3770697/simple-form/trunk/app/FileUpload.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: whysocscs (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-27T19:42:07.000Z | Vendor Notified |
| CNA | 2026-10-30T20:12:28.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.