Vigie VulnDBEuropean-hosted Vulnerability DB

CVE-2023-0567

password_verify() always returns true for some invalid hashes

At a glance

Severity
HIGH 7.7
EPSS
EPSS 0.92 % · percentile 60 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
php
NVD status
Modified

Description

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.

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.7CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nphp
CVSS 3.1HIGH 8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NCISA-ADP
CVSS 3.1HIGH 7.7CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NNVD · security@php.net (Secondary)
CVSS 3.1MEDIUM 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NNVD · nvd@nist.gov (Primary)
CVSS 3.1HIGH 8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
PHP Group · PHPaffected 8.0.* < 8.0.28 ; affected 8.1.* < 8.1.16 ; affected 8.2.* < 8.2.3

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD