phpBB version 3.2.0 is vulnerable to SSRF in the Remote Avatar function resulting allowing an attacker to perform port scanning, requesting internal content and potentially attacking such internal services via the web application.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000419
Reference (s):
- https://www.phpbb.com/community/viewtopic.php?f=14&p=14782136
- https://www.sec-consult.com/en/blog/advisories/phpbb-server-side-request-forgery-vulnerability/index.html