What the vulnerability does
01Description
The Html Social share buttons plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'zm_sh_btn' shortcode in all versions up to, and including, 2.1.16 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Explanation of Vulnerability in Simple Terms
02Summary
Html Social share buttons versions 2.1.16 and earlier contain a cross-site scripting vulnerability. An attacker with low-level site access can inject malicious scripts that execute in other users' browsers, potentially stealing session tokens or modifying page content. The vulnerability affects all site visitors due to scope change.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers and steals their session data or modifies page content.
Potential impact on your site
04Site Impact
Any logged-in user with contributor-level access or higher can compromise other users' sessions or deface site content.
Conditions required to exploit
05Prerequisites
Attacker needs a low-privilege account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
September 6, 2025
CVE published
April 8, 2026
Record updated
