phpBB 2.0.8a and earlier trusts the IP address that is in the X-Forwarded-For in the HTTP header, which allows remote attackers to spoof IP addresses.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15909
http://www.securityfocus.com/bid/10170
http://marc.info/?l=bugtraq&m=108241122908409&w=2
http://marc.info/?l=bugtraq&m=108239864203144&w=2
Source: Mitre, NVD
Published: 2004-04-19
Updated: 2026-06-16
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Severity: High
EPSS: 0.00619