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

CVE-2026-15664Published · Updated

Action summary

Affected: ≤5.7.1Update to 5.7.2 or newer

All remediation steps
Watch plugin
Severity
High7.2
CVSS
7.2
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Quill Forms | Conversational Multi Step Forms, Surveys & quizzes quillforms

  1. Affected≤ 5.7.1
  2. Patched in5.7.2

Update to 5.7.2 or newer.

You are affected if you run ≤ 5.7.1. Version 5.7.2 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Quill Forms | Conversational Multi Step Forms, Surveys & quizzes.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 5.7.2, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Quill Forms | Conversational Multi Step Forms, Surveys & quizzes to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to zickzick2.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Quill Forms | Conversational Multi Step Forms, Surveys & quizzes

All 7
More vulnerabilities in Quill Forms | Conversational Multi Step Forms, Surveys & quizzes
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting
≤5.7.1Update to 5.7.2
CVE-2026-28568
High7.2Unauthenticated Stored Cross-Site Scripting
≤5.7.1Update to 5.7.2
CVE-2026-75091
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.10.0Update to 4.0.0
CVE-2024-11826
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.7.0Update to 3.8.0
CVE-2024-47393
Medium5.4Cross-Site Request Forgery
≤3.3.0Update to 3.4.0
—

Same weakness (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 7.2

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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