CVE-2021-22160
high-risk
Published 2021-05-26
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).
Do I need to act?
!
18.5% chance of exploitation in next 30 days
EPSS score — higher than 81% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (16)
50
/ 100
high-risk
Severity
32/34 · Critical
Exploitability
13/34 · Low
Exposure
5/34 · Minimal