Is SimpleForm safe to use?

Laskyr does not give safety verdicts. No known unpatched vulnerabilities in the latest version (3.11.0). As of 2026-11-04. 2 issues are on record for older versions; version 3.11.0 or newer fixes all of them that state a fix. Keep SimpleForm on the latest version (3.11.0) and remove it if you do not use it.

Which versions of SimpleForm are vulnerable?

Known issues on record (newest first): Arbitrary file upload (3.10.2 and older, fixed in 3.11.0); Privilege escalation (3.10.0 and older, fixed in 3.10.1). The full list with sources is on this page.

What is the latest version of SimpleForm?

3.11.0, according to wordpress.org (last updated 2026-10-28). It has 30+ active installs.

What should I do if my SimpleForm is out of date?

Take a backup, then update it from Dashboard > Updates (or run wp plugin update simple-form). If you cannot update right away, deactivate it until you can. If you think the site was already attacked, run a free scan at https://laskyr.com/scan.

Plugins · simple-form · data as of 2026-11-04

Is SimpleForm safe? Known vulnerabilities and latest version

Latest version: 3.11.0
Last updated: 2026-10-28
Active installs: 30+
Known issues on record: 2
Unpatched in latest: 0
Tested up to WP: 7.1.4 · PHP 7.4+

Build forms, quizzes, and polls that send every submission straight to Telegram, Slack, WhatsApp or Google Sheets. — by wpazleen

What to do

Update to the latest version (3.11.0). Anything older than 3.11.0 has at least one known issue listed below. Dashboard → Updates, or Plugins → “update now”.
If you cannot update right away, deactivate it until you can.
Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
If you ran a vulnerable version and something looks off (spam pages, strange admins, redirects), run the free scan.

With WP-CLI: wp plugin get simple-form --field=version shows what you run; wp plugin update simple-form updates it.

Check your version

Known vulnerabilities

2 on record, newest first. “Affected” is the version range the source gives; “fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version.

critical 9.8 CVE-2026-118235 · published 2026-10-31

Arbitrary file upload in SimpleForm (3.10.2 and older)

Affected: 3.10.2 and older
Fixed in: 3.11.0 *
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Wordfence

Details from the advisory

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.

NVD CVE-2026-118235 Wordfence advisory Code change (fix)plugins.svn.wordpress.org Plugin source

critical 9.8 CVE-2026-104748 · published 2026-10-14

Privilege escalation in SimpleForm (3.10.0 and older)

Affected: 3.10.0 and older
Fixed in: 3.10.1 *
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Wordfence

Details from the advisory

The SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.10.0 This is due to the `wp_ajax_nopriv_simpleform_wp_register` AJAX action lacking any capability check for role assignment and the `save_custom_fields_to_user_meta()` function using an exclusion list that omits `wp_capabilities`, combined with `get_form_settings()` returning a hard-coded defaults array that unconditionally enables meta writing regardless of the supplied `form_id`. This makes it possible for unauthenticated attackers to create a new Administrator-level WordPress account by supplying `wp_capabilities[administrator]=1` alongside standard registration fields. The nonce required by the endpoint is publicly emitted into the `front_end_data` JavaScript object on every front-end page via `wp_enqueue_scripts`, making it trivially obtainable by any unauthenticated visitor before submitting the malicious request.

NVD CVE-2026-104748 Wordfence advisory Code change (fix)plugins.svn.wordpress.org Plugin source

Recent activity

2026-10-28 — latest release on wordpress.org (3.11.0).
2026-10-31 — Arbitrary file upload disclosed (CVE-2026-118235), fixed in 3.11.0.
2026-10-14 — Privilege escalation disclosed (CVE-2026-104748), fixed in 3.10.1.

Free. We check the CVE feeds every day and email you only when a new issue for SimpleForm (simple-form) is published or a fix ships. Unsubscribe in one click.

Browse vulnerabilities

Types found in this plugin: Arbitrary file upload (1) · Privilege escalation (1)

Where this data comes from

Version, last update, installs: wordpress.org/plugins/simple-form (Plugins API), fetched 2026-11-04.
Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Each record links to its CVE page and to the original advisory (Wordfence, Patchstack or WPScan) where there is one. We only list a CVE here when its references or its advisory name this exact plugin, so a few real issues may be missing; none should be about a different plugin. Spot an error? Email Daniel.

Badge for your site or docs (states facts with a date, not a verdict):

<a href="https://laskyr.com/plugins/simple-form"><img src="https://laskyr.com/plugins/simple-form/badge.svg" alt="SimpleForm vulnerability status"></a>

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