VULNERABILITY INTELLIGENCE

CVE-2021-22160

CVSS score9.8 CRITICAL
EPSS probability52.93%
CISA KEVNot currently listed
Published2021-05-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

If Apache Pulsar is configured to authenticate clients using tokens based on JSON Web Tokens (JWT), the signature of the token is not validated if the algorithm of the presented token is set to "none". This allows an attacker to connect to Pulsar instances as any user (incl. admins).

Weakness classification

  • nvd@nist.gov: CWE-347

Primary references