CVE-2023-0567: PHP

Medium severity, CVSS 6.2. EPSS: 0.9% chance of exploitation in the next 30 days.

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, password_verify() function may accept some invalid Blowfish hashes as valid. If such invalid hash ever ends up in the password database, it may lead to an application allowing any password for this entry as valid.

Affected products

• PHP PHP: from 8.0.0, before 8.0.28 (fixed in 8.0.28); from 8.1.0, before 8.1.16 (fixed in 8.1.16); from 8.2.0, before 8.2.3 (fixed in 8.2.3)

Published 2023-03-01. Last modified 2026-07-19.