CVE-2026-91073
Received Received - Intake

Stored XSS in Subscribe Forms WordPress Plugin

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: WPScan

Description
The Subscribe Forms WordPress plugin before 1.6.3 does not sanitise and escape one of its form settings before outputting it in a page, allowing authenticated users with the Author role and above to perform Stored Cross-Site Scripting attacks that execute in the browser of any visitor who views a page embedding the form, including logged-out visitors and administrators.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-23
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-91073
EUVD
EUVD-2026-85058

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
wpforms subscribe_forms to 1.6.3 (exc)
artus_kg subscribe_forms to 1.6.2 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the WordPress plugin 'Subscribe Forms' versions 1.4.1 to 1.6.2. It occurs because the plugin does not properly sanitize and escape a form setting called 'Attention Effect.' Authenticated users with Author role or higher can inject malicious scripts into the plugin's output.

Detection Guidance

To detect this vulnerability, check the installed version of the Subscribe Forms plugin. If it is between 1.4.1 and 1.6.2, the system is vulnerable. Use WordPress admin panel or run a command like 'wp plugin list' in the WordPress directory to verify the version.

Impact Analysis

When a page with the affected form is viewed, the injected script executes in the visitor's browser. This can affect anyone viewing the page, including logged-out users and administrators. The impact includes potential theft of session cookies, defacement of the website, or redirection to malicious sites.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, which may violate GDPR and HIPAA requirements for data protection and security. Organizations using the vulnerable plugin may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Immediately update the Subscribe Forms plugin to version 1.6.3 or later. Remove or disable the plugin if updating is not possible. Review user roles to ensure only trusted users have Author or higher permissions.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-91073. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart