guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Affected versions are subject to improper header parsing. An attacker could sneak in a newline (\n) into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n (CVE-2023-29197).
Manualthumb bypasses badFile lookup (CVE-2023-36674).
XSS in BlockLogFormatter due to unsafe message use (CVE-2023-36675).