Reported vulnerability

Quill Forms | Conversational Multi Step Forms, Surveys & quizzes <= 5.7.1 - Unauthenticated Stored Cross-Site Scripting via Multiple Choice 'Other' Value

Q: Which versions of Quill Forms | Conversational Multi Step Forms, Surveys & quizzes are affected?

Wordfence lists these affected versions: Start version unspecified, through 5.7.1. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Quill Forms | Conversational Multi Step Forms, Surveys & quizzes?

Wordfence reports a fix for this issue in Quill Forms | Conversational Multi Step Forms, Surveys & quizzes. It lists these fixed versions: 5.7.2. 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 18 Sept 2026

Updated 19 Sept 2026

CVE-2026-15664

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

high · CVSS 7.2

The Quill Forms | Conversational Multi Step Forms, Surveys & quizzes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Multiple Choice 'Other' Value in all versions up to, and including, 5.7.1 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 injected script executes in the context of the WordPress admin results view, making administrators the primary target when reviewing submitted form entries.

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

Quill Forms | Conversational Multi Step Forms, Surveys & quizzes

Software: plugin · quillforms
Affected versions: Start version unspecified, through 5.7.1
Fix availability: Fix available
Fixed versions: 5.7.2

Recommended action

Update to version 5.7.2, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/1261881f-7a04-47fb-8176-6a9ac2088f8d?source=api-prod

Data sources and licences

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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 Quill Forms | Conversational Multi Step Forms, Surveys & quizzes are affected?

Wordfence lists these affected versions: Start version unspecified, through 5.7.1. Use the version checker above to compare your installed release with this report.

Is a fix available for Quill Forms | Conversational Multi Step Forms, Surveys & quizzes?

Wordfence reports a fix for this issue in Quill Forms | Conversational Multi Step Forms, Surveys & quizzes. It lists these fixed versions: 5.7.2. 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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