What the vulnerability does
01Description
The Instant-Quote.co Quotation Page plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.3.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. A Contributor-level user can trigger execution against higher-privileged users by embedding the malicious shortcode in a post submitted for review, causing the injected scripts to execute when an administrator previews or views the post.
Explanation of Vulnerability in Simple Terms
02Summary
The Instant-Quote.co Quotation Page contains a cross-site scripting (XSS) vulnerability in versions up to 1.3.4. An authenticated user can inject malicious scripts that execute in other users' browsers, potentially compromising their sessions or stealing sensitive data. The vulnerability affects the entire application scope due to its network-accessible nature.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers to steal session data or perform actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated users' sessions and data can be compromised; attackers can perform unauthorized actions across the application.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
May 27, 2026
CVE published
May 27, 2026
Record updated
