CVE-2022-33683Network attack vector

HTTPS data exposure via disabled certificate validation

Published Sep 23, 2022 · Updated May 22, 2025

Improper certificate validation in Apache Pulsar Broker and Proxy allows man-in-the-middle attackers to read internal HTTPS data. Brokers and proxies create an internal Pulsar Admin Client that accepts peer TLS certificates without verification even when tlsAllowInsecureConnection is disabled. Exploitation requires control of a machine on the traffic path and active manipulation; affected releases can expose authentication, configuration, and other client data.

CVSS severity5.9
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Apache Pulsar Broker and Proxy allows man-in-the-middle attackers to read internal HTTPS data. Brokers and proxies create an internal Pulsar Admin Client that accepts peer TLS certificates without verification even when tlsAllowInsecureConnection is disabled. Exploitation requires control of a machine on the traffic path and active manipulation; affected releases can expose authentication, configuration, and other client data.

The record

CVE
CVE-2022-33683
Published
Sep 23, 2022
Updated
May 22, 2025
Vendor
The Apache Software Foundation
Product
Apache Pulsar
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.10.0
  2. Affected versionversion=2.6 and earlier <=2.6.4
  3. Affected versionversion=2.7 <=2.7.4
  4. Affected versionversion=2.8 <=2.8.3
  5. Affected versionversion=2.9 <=2.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Pulsarversion=2.10.0; version=2.6 and earlier <=2.6.4; version=2.7 <=2.7.4; version=2.8 <=2.8.3; version=2.9 <=2.9.2

Published CVSS scores

5.9CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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