Answer in brief
CVE-2026-15664 records a Unknown severity vulnerability in Quill Forms | Conversational Multi Step Forms, Surveys & quizzes <= 5.7.1 - Unauthenticated Stored Cross-Site Scripting via Multiple Choice 'Other' Value. The current sources do not mark it as known exploited. The current feed maps mdmag/Quill Forms | Conversational Multi Step Forms, Surveys & quizzes (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps mdmag/Quill Forms | Conversational Multi Step Forms, Surveys & quizzes (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mdmag/Quill Forms | Conversational Multi Step Forms, Surveys & quizzesgeneric | 0 | Not reported |
Published upstream
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.