The vulnerability of the php_url_parse_ex() function in the PHP interpreter allows a hacker to perform an SSRF attack.

The vulnerability of the phpurlparseex function in the PHP interpreter is related to insufficient validation of incoming requests. Exploiting this vulnerability allows a malicious actor to execute an SSRF attack remotely...

php: Buffer over-read in php_url_parse_ex

The phpurlparseex function in ext/standard/url.c in PHP before 5.5.38 allows remote attackers to cause a denial of service buffer over-read or possibly have unspecified other impact via vectors involving the smartstr data type...