Detections
Analytics

phpBB User Enumeration

medium Web App Scanning Plugin ID 112804

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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

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

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

Plugin Details

Severity: Medium

ID: 112804

Type: remote

Published: 6/14/2021

Updated: 11/17/2023

Scan Template: basic, full, pci, scan

Risk Information

VPR

Risk Factor: Low

Score: 2.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: CVSS2#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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: Tenable

Reference Information