CVE-2026-3129

Name of the Vulnerable Software and Affected Versions LiteSpeed Cache versions prior to 7.8

Description The LiteSpeed Cache plugin for WordPress contains a Stored Cross-Site Scripting issue. This occurs because of a flawed regular expression used to strip width and height attributes from images when the Lazy Load Images and Add Missing Sizes features are active. Authenticated attackers with Author-level access or higher can inject arbitrary web scripts into pages, which then execute when a user visits the affected page.

Recommendations Update the plugin to version 7.8 or later. As a temporary mitigation, disable the Lazy Load Images and Add Missing Sizes features.