Reported vulnerability

Contact Form, Survey, Quiz & Popup Form Builder – ARForms <= 1.8.5 - Unauthenticated PHP Object Injection

Q: Which versions of Contact Form, Survey, Quiz & Popup Form Builder – ARForms are affected?

Wordfence lists these affected versions: Start version unspecified, through 1.8.5. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Contact Form, Survey, Quiz & Popup Form Builder – ARForms?

Wordfence reports a fix for this issue in Contact Form, Survey, Quiz & Popup Form Builder – ARForms. It lists these fixed versions: 1.8.6. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 15 Aug 2026

Updated 16 Aug 2026

CVE-2024-13784

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

critical · CVSS 9.8

The Contact Form, Survey, Quiz & Popup Form Builder – ARForms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.8.5 via deserialization of untrusted input from form submissions. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Contact Form, Survey, Quiz & Popup Form Builder – ARForms

Software: plugin · arforms-form-builder
Affected versions: Start version unspecified, through 1.8.5
Fix availability: Fix available
Fixed versions: 1.8.6

Recommended action

Update to version 1.8.6, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/5e0116d6-91c3-4212-9c68-6b706ab09768?source=api-prod

Data sources and licences

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Read licence terms

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of Contact Form, Survey, Quiz & Popup Form Builder – ARForms are affected?

Wordfence lists these affected versions: Start version unspecified, through 1.8.5. Use the version checker above to compare your installed release with this report.

Is a fix available for Contact Form, Survey, Quiz & Popup Form Builder – ARForms?

Wordfence reports a fix for this issue in Contact Form, Survey, Quiz & Popup Form Builder – ARForms. It lists these fixed versions: 1.8.6. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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