phpBB vulnerabilities
We track 5 vulnerabilities in phpBB products. 5 are rated high or critical, and none are known to be exploited. The most recent was published on June 12, 2026.
Latest phpBB vulnerabilities
- 8.0 High severity
phpBB: Cross-Site Request Forgery
Improper state verification in the OAuth implementation could allow an attacker to manipulate the authentication flow and cause a victim’s account to be linked to an attacker-controlled account. This can result in unauthorized account linking and potential acc
- 9.8 Critical severity
phpBB: Improper Authentication
Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.
- 7.2 High severity
phpBB: Improper Access Control
Improper verification of access permissions when modifying permissions through the Administration Control Panel (ACP) allowed an authenticated administrator to grant permissions beyond the level authorized for their account, resulting in privilege escalation w
- 8.1 High severity
phpBB: Weak Password Recovery Mechanism for Forgotten Password
phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. When force_server_vars is disabled, the servers hostname may be extracted from the HTTP Host header which is used to generate the password reset link URL.
- 8.8 High severity
Phpbb: Cross-Site Request Forgery
Cross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary code via the login function and the authentication mechanism