The tweet mentions a possible WAF bypass using the payload 'privet rebyata , Moscow is calling' at the PHDays Fest event. The bypass is related to application authentication. This tweet indicates a potential vulnerability that can be exploited for bypassing the WAF security. It would be interesting to investigate further and understand how this payload can circumvent the WAF protection. Keep an eye out for updates on this topic.
For more details, check out the original tweet here: https://twitter.com/GodfatherOrwa/status/1915919805955117096