CVE-2026-48612: 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…

PriorityP347high8CVSS 3.0

AVNACHPRLUIRSCCHIHAH

EPSS

0.12%

2.2th percentile

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 account takeover.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
phpbb	phpbb	3.3.0 – 3.3.16	—

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.