phpBB User Enumeration

medium Web Application Scanning Plugin ID 112804

Synopsis

phpBB User Enumeration

Description

In a default phpBB installation there are unauthenticated methods to enumerate member usernames. These phpBB users can then be used in brute-force attacks against phpBB login page to guess passwords.

Solution

Disable access to the phpBB Atom feed if not required, and ensure the guest group does not have access to memberlist.php.

See Also

https://www.phpbb.com/support/docs/en/3.3/ug/quickstart/permissions_global/

http://morningstarsecurity.com/research/username-anarchy

Plugin Details

Severity: Medium

ID: 112804

Type: remote

Published: 6/14/2021

Updated: 11/26/2021

Scan Template: scan, pci

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: Tenable

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS Score Source: Tenable

Reference Information