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Monday, February 17, 2025

Six million websites are vulnerable to a new LiteSpeed cache vulnerability.

Millions of websites are at risk due to a LiteSpeed Cache WordPress plugin unauthenticated account takeover vulnerability.

An further security flaw in the WordPress plugin LiteSpeed Cache was identified: an Unauthenticated Privilege Escalation that might result in a complete takeover of the website. Regretfully, the problem might not be solved by just updating to the most recent version of the plugin.

Plugin for LiteSpeed Cache

With more than 6 million installations, the LiteSpeed Cache Plugin optimizes the speed of websites. In order to save the server from having to continually retrieve the exact same page elements from the database each time a browser requests a web page, a caching plugin keeps a static duplicate of the data required to generate a web page.

Storing the page in a “cache” reduced the server load and speeds up the time it takes to deliver a web page to a browser or a crawler.

LiteSpeed Cache also does other page speed optimizations like compressing CSS and JavaScript files (minifying), puts the most important CSS for rendering a page in the HTML code itself (inlined CSS) and other optimizations that together make a site faster.

Unauthenticated Privilege Escalation

An unauthenticated privilege escalation is a type of vulnerability that allows a hacker to attain site access privileges without having to sign in as a user. This makes it easier to hack a site in comparison to an authenticated vulnerability that requires a hacker to first attain a certain privilege level before being able to execute the attack.

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