The tweet highlights a WAF bypass technique using X-Forwarded-For header spoofing to alter banners on Spotify artist profiles. The vulnerabilities mentioned include Insecure Direct Object References (IDOR) in PUT /artist-profile and lax OAuth validation on third-party apps. Attackers can exploit these issues to make direct requests and modify banners. A single curl command can be used to exploit this bypass. More technical details are needed to identify the specific WAF vendor and further analyze the bypass.
Check out the original tweet here: https://twitter.com/officialorean/status/1882780006369398865