XML external entity (XXE) vulnerability in the GlobalProtect internal and external gateway interface in Palo Alto Networks PAN-OS before 6.1.18, 7.0.x before 7.0.17, 7.1.x before 7.1.12, and 8.0.x before 8.0.3 allows remote attackers to obtain sensitive information, cause a denial of service, or conduct server-side request forgery (SSRF) attacks via unspecified vectors.