CVE-2026-118235 json
SimpleForm <= 3.10.2 - Unauthenticated Arbitrary File Upload via Trailing-Dot Filename via Unknown File Key in simpleform_get_submit_data
published 2026-10-31 8 d ago modified 2026-11-02 6 d ago also EUVD-2026-114672
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 6 d ago
Exploit prediction
0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- wpazleen SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- wordfence.com /threat-intel/vulnerabilities/id/6aac2178-f6ce-4444-9afc-7e014547cd48?source=cve
- plugins.trac.wordpress.org /browser/simple-form/tags/3.10.2/app/FileUpload.php#L142
- plugins.trac.wordpress.org /browser/simple-form/tags/3.10.2/app/FileUpload.php#L118
- plugins.trac.wordpress.org /browser/simple-form/tags/3.10.2/app/FileUpload.php#L137
- plugins.trac.wordpress.org /browser/simple-form/tags/3.10.2/app/Ajax/Tables.php#L988
- plugins.trac.wordpress.org /browser/simple-form/tags/3.10.2/app/Ajax/Tables.php#L67
- plugins.trac.wordpress.org /browser/simple-form/tags/3.10.2/app/Ajax/Tables.php#L973
- plugins.svn.wordpress.org /simple-form/trunk/
- plugins.trac.wordpress.org /changeset/3770697/simple-form/trunk/app/FileUpload.php
Sources
- CVE List CVE-2026-118235
- NVD CVE-2026-118235
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.