What the vulnerability does
01Description
The Webling plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 3.9.0 due to insufficient input sanitization, insufficient output escaping, and missing capabilities checks in the 'webling_admin_save_form' and 'webling_admin_save_memberlist' functions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject Webling forms and memberlists with arbitrary web scripts that will execute whenever an administrator views the related form or memberlist area of the WordPress admin.
Explanation of Vulnerability in Simple Terms
02Summary
Webling versions up to 3.9.0 contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component. An attacker with low-level credentials can inject code that executes in other users' browsers, potentially compromising their sessions or data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers, potentially stealing session data or performing actions on their behalf.
Potential impact on your site
04Site Impact
Users' accounts and data are at risk if an attacker with basic credentials injects malicious code affecting other site visitors.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the Webling instance; no user interaction required from the victim.
Key dates
06Disclosure timeline
April 10, 2026
CVE published
April 10, 2026
Record updated
