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CVE-2022-33683

Disabled Certificate Validation makes Broker, Proxy Admin Clients vulnerable to MITM attack

5.9 MediumFix available

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.68%Down 0.2 points since Sep 24, 2022
90%50%10%1%

What each source reports

NVD Score used 5.9

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Record
CVE-2022-33683
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-295
Updated
2026-11-02
CVE List 5.9

Disabled Certificate Validation makes Broker, Proxy Admin Clients vulnerable to MITM attack

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Record
CVE-2022-33683
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-295
Updated
2026-11-02
EUVDEUVD-2022-6846 5.9

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Record
EUVD-2022-6846
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-j3qw-g67q-7m64 5.9

Apache Pulsar Brokers and Proxies vulnerable to Improper Certificate Validation

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Record
GHSA-j3qw-g67q-7m64
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-295
Updated
2026-11-02
OSV 5.9

Disabled Certificate Validation makes Broker, Proxy Admin Clients vulnerable to MITM attack

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Record
CVE-2022-33683
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-295
Updated
2026-11-02
OSVGHSA-j3qw-g67q-7m64 5.9

Apache Pulsar Brokers and Proxies vulnerable to Improper Certificate Validation

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack. This issue affects Apache Pulsar Broker and Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Record
GHSA-j3qw-g67q-7m64
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-295
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.apache.pulsar:pulsar-broker
Maven
before 2.7.5
2.7.5
org.apache.pulsar:pulsar-proxy
Maven
before 2.7.5
2.7.5
org.apache.pulsar:pulsar-broker
Maven
2.8.0 up to 2.8.4
2.8.4
org.apache.pulsar:pulsar-proxy
Maven
2.8.0 up to 2.8.4
2.8.4
org.apache.pulsar:pulsar-broker
Maven
2.9.0 up to 2.9.3
2.9.3
org.apache.pulsar:pulsar-proxy
Maven
2.9.0 up to 2.9.3
2.9.3
org.apache.pulsar:pulsar-broker
Maven
2.10.0 to 2.10.0
2.10.1
org.apache.pulsar:pulsar-proxy
Maven
2.10.0 to 2.10.0
2.10.1
org.apache.pulsar:pulsar-broker
Maven
before 2.7.5, plus listed versions
1.19.0-incubating1.20.0-incubating1.21.0-incubating1.22.0-incubating1.22.1-incubating
Show 25 moreShow less
2.0.0-rc1-incubating2.0.1-incubating2.1.0-incubating2.1.1-incubating2.2.02.2.12.3.02.3.12.3.22.4.02.4.12.4.22.5.02.5.12.5.22.6.02.6.12.6.22.6.32.6.42.7.02.7.12.7.22.7.32.7.4
2.7.5
org.apache.pulsar:pulsar-proxy
Maven
before 2.7.5, plus listed versions
1.19.0-incubating1.20.0-incubating1.21.0-incubating1.22.0-incubating1.22.1-incubating
Show 25 moreShow less
2.0.0-rc1-incubating2.0.1-incubating2.1.0-incubating2.1.1-incubating2.2.02.2.12.3.02.3.12.3.22.4.02.4.12.4.22.5.02.5.12.5.22.6.02.6.12.6.22.6.32.6.42.7.02.7.12.7.22.7.32.7.4
2.7.5
Show 6 moreShow less
Affected packages
PackageAffectedFixed
org.apache.pulsar:pulsar-broker
Maven
2.8.0 up to 2.8.4, plus listed versions
2.8.12.8.22.8.3
2.8.4
org.apache.pulsar:pulsar-proxy
Maven
2.8.0 up to 2.8.4, plus listed versions
2.8.12.8.22.8.3
2.8.4
org.apache.pulsar:pulsar-broker
Maven
2.9.0 up to 2.9.3, plus listed versions
2.9.12.9.2
2.9.3
org.apache.pulsar:pulsar-proxy
Maven
2.9.0 up to 2.9.3, plus listed versions
2.9.12.9.2
2.9.3
org.apache.pulsar:pulsar-broker
Maven
2.10.0 up to 2.10.1
2.10.1
org.apache.pulsar:pulsar-proxy
Maven
2.10.0 up to 2.10.1
2.10.1

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-33683 is a medium vulnerability (CVSS 5.9) in Apache Pulsar, published September 23, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.68%, the 52nd percentile. Fixed in org.apache.pulsar:pulsar-broker 2.7.5.

References

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