CVE-2026-103369: Social Share Buttons & Analytics Plugin <= 4.5 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'response' Parameter via gs_update_with_values AJAX
The Social Share Buttons & Analytics Plugin – GetSocial.io plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'response' parameter in all versions up to, and including, 4.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is stored in the gs-alert-msg, gs-alert-utm, and gs-alert-cta WordPress options and executes in an administrator's browser when the GetSocial settings page is visited.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker needs an authenticated WordPress account with at least Subscriber-level access. They can use the gs_update_with_values AJAX functionality to submit a malicious value through the response parameter.
What is the impact after a successful exploit?
The malicious script is stored in the gs-alert-msg, gs-alert-utm, and gs-alert-cta WordPress options. It executes in an administrator's browser when the administrator visits the GetSocial settings page.
Which plugin versions are affected?
All versions of the GetSocial.io Social Share Buttons & Analytics Plugin up to and including version 4.5 are affected.