Vulnerability in PHP
CVE-2023-0567
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.php.net/bug.php (Vendor Advisory)
- github.com/php/php-src/security/advisories/GHSA-7fj2-8x79-rjf4 (Exploit, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-0567?
- CVE-2023-0567 is a high-severity vulnerability in PHP, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.7/10. Published 2023-03-01.
- How severe is CVE-2023-0567?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2023-0567 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.