<ul><li>Web Cache Deception is a vulnerability discovered in 2017 where caching systems can cache sensitive, dynamic content meant for authenticated users, making it publicly accessible due to incorrect configurations.</li><li>The vulnerability occurs when caching systems base their caching decisions solely on the URL structure, potentially ignoring the actual server behavior. This can lead to private information being cached and exposed to unauthorized users.</li><li>Monitoring HTTP headers like X-Cache, Cf-Cache-Status, and Age can help identify such vulnerabilities. Exploitation scenarios include tricking caching systems with manipulated URLs to cache sensitive information that should not be publicly available.</li><li>In a real-world example, exploiting Web Cache Deception could allow attackers to reuse invalidated invite links on applications like Discord, leading to potential security breaches even after the links have been removed or expired.</li></ul>

Web Cache Deception Attacks

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