This tweet mentions a WAF bypass using the payload "-". While the specific vendor of the WAF is not mentioned, the payload is a single dash character. This kind of bypass attempt may be targeting various WAFs to see if they improperly filter or block such minimal input. Typically, WAF bypasses aim to exploit insufficient filtering to allow malicious payloads like XSS, SQL injection, or RCE to pass through. However, this tweet does not provide further technical details or context about the WAF product or the type of vulnerability affected. Without more information, it's difficult to pinpoint the exact impact or method of this bypass. However, the simplicity of the payload suggests it is an attempt to test WAF strictness or evasion capabilities. More detailed write-ups or technical analysis would be needed to understand and replicate this bypass reliably.
For more insights, check out the original tweet here: https://twitter.com/_D4LT0N/status/1954094326650179630