CVE-2021-22160

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

52.93% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.9% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-05-26 12:22Z5 YR AGO

Last updated

2024-08-03 18:37Z2 YR AGO

Reserved

2021-01-05

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-347Improper Verification of Cryptographic SignatureBase

Data version

5.1

Document digest

5b48ed827b3380287c2fc899fe9daab06b2ca43cf33c378e4016d2fde23c5281

• lists.apache.orghttps://lists.apache.org/thread.html/r347650d15a3e9c5f58b83e918b6ad6dedc2a63d3eb63da8e6a7be87e%40%3Cusers.pulsar.apache.org%3Ex_refsource_MISC
• lists.apache.org[pulsar-dev] 20210527 Cutting 2.6.4 release to address CVE-2021-22160https://lists.apache.org/thread.html/rf2e90942996dceebac8296abf39257cfeb5ae918f82f7af3d37a48c5%40%3Cdev.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[pulsar-dev] 20210527 Re: [SECURITY] [CVE-2021-22160] Authentication with JWT allows use of "none"-algorithmhttps://lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529b089550%40%3Cdev.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[pulsar-users] 20210527 Re: [SECURITY] [CVE-2021-22160] Authentication with JWT allows use of "none"-algorithmhttps://lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529b089550%40%3Cusers.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[pulsar-dev] 20210527 Re: Cutting 2.6.4 release to address CVE-2021-22160https://lists.apache.org/thread.html/r8e545559781231a83bf0644548c660255859e52feb86bbfcd42590da%40%3Cdev.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.orgRe: [SECURITY] [CVE-2021-22160] Authentication with JWT allows use of “none”-algorithmhttps://lists.apache.org/thread.html/r9a12b4da2f26ce9b8f7e7117a879efaa973dab7e54717bbc7923fab1%40%3Cdev.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[pulsar-dev] 20210531 Re: [DISCUSS] Propose More Formal Policy for Security Patches and EOL of Versionshttps://lists.apache.org/thread.html/rbe845aa1573a61769b9c5916c62971f4b10de87c2ea5f38a97f0cf84%40%3Cdev.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[pulsar-dev] 20210604 Re: [DISCUSS] Propose More Formal Policy for Security Patches and EOL of Versionshttps://lists.apache.org/thread.html/rca54f4b26ba5e6f2e39732b47ec51640e89f57e3b6a38ac3bab314df%40%3Cdev.pulsar.apache.org%3Emailing-listx_refsource_MLIST