CVE-2021-22160
Critical
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).
SeverityCritical
CVSS9.8
Exploit probability—
Product
Apache Pulsar
PublishedMay 26, 2021
First seenMay 26, 2021
How to fix
Update
- apache pulsar2.7.1 or later
- org.apache.pulsar:pulsar2.7.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache pulsar | v < 2.7.1 | 2.7.1 |
| org.apache.pulsar:pulsarMaven | v < 2.7.2 | 2.7.2 |
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