CVE-2021-46743

Firebase PHP-JWT < 6.0.0 - Algorithm Confusion

criticalAccess of Resource Using Incompatible Type ('Type Confusion')

9.1

CVSS Score

9.1

CVSS Score

critical

Severity

2.1.1

Patched in

438d

Time to patch

Description

In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue (e.g., RS256 / HS256) exists via the kid (aka Key ID) header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. This may or may not be exploitable in WordPress plugins and themes using the library.

CVSS Vector Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

High

Confidentiality

High

Integrity

None

Availability

Technical Details

Affected versions<=2.1.0

PublishedNovember 11, 2022

Last updatedJanuary 22, 2024

Affected pluginjwt-auth

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/8aa0fffa-475e-4227-9ab1-17ca6fcce529?source=api-prod

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