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CVE-2023-0567

password_verify() always returns true for some invalid hashes

High7.7EPSS 0.92%
Published
Updated
Reserved
Assigned by
php

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.

Timeline

  1. ID reserved

    By php

  2. · 18 days later

    Published

  3. · 3 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-0567, by who scored it
Scored byCVSSScoreVector
phpCNA (assigner)3.1High7.7CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA-ADPADP (enrichment)3.1High8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVDNVD · Modified3.1Medium6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS (exploitation in 30 days)
0.92% · top 39% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.

Weakness

Affected products

  • PHP Group · PHP

    • affected 8.0.* – < 8.0.28
    • affected 8.1.* – < 8.1.16
    • affected 8.2.* – < 8.2.3

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .