This tweet presents three bypass techniques targeting the Akamai Web Application Firewall (WAF). The payloads use JavaScript's replace function in creative ways involving template literals and regular expressions to execute an alert, which is often a demonstration of cross-site scripting (XSS) capabilities. The first payload uses the replace.call method with a template literal embedding a regular expression and an alert function. The second method uses a tagged template with replace and an alert function. The third payload applies the replace method with a regex and an alert. These methods exploit how Akamai's WAF may inadequately inspect or parse such JavaScript constructs, allowing malicious scripts to bypass detection. Understanding these techniques is valuable for bug hunters and security professionals testing or enhancing WAF rules. It's crucial to address these bypass methods to prevent potential XSS attacks, which can compromise web application security.
For more details, check out the original tweet here: https://twitter.com/Amitlt2/status/1963472850611798332