mdmag Quill Forms Plugin up to 5.7.1 on WordPress cross site scripting

Summaryinfo

A vulnerability was found in mdmag Quill Forms Plugin up to 5.7.1. It has been rated as problematic. This vulnerability affects unknown code. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2026-15664. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in mdmag Quill Forms Plugin up to 5.7.1. This affects an unknown function. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-15664 since 07/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• mdmag

Name

• Quill Forms Plugin

Version

• 5.7.0
• 5.7.1

CPE 2.3info

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CPE 2.2info

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