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CVE-2022-33683

16
FAUCET Score

CVE-2022-33683 describes a vulnerability in Apache Pulsar Brokers and Proxies (versions 2.7.0-2.7.4, 2.8.0-2.8.3, 2.9.0-2.9.2, 2.10.0, and 2.6.4 and earlier) where the internal Pulsar Admin Client fails to verify peer TLS certificates, even when configured to do so. This creates a medium-severity risk (CVSS 5.9) for man-in-the-middle attacks on intra-cluster and geo-replication HTTPS connections, potentially leading to the leakage of authentication and configuration data. Exploitation requires an attacker to control a machine between the client and server and actively manipulate traffic, making it a high attack complexity. There is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.7.5CPE matchmatch criteria
cpe:2.3:a:apache:pulsar:*:*:*:*:*:*:*:*
>= 2.8.0, < 2.8.4CPE matchmatch criteria
cpe:2.3:a:apache:pulsar:*:*:*:*:*:*:*:*
>= 2.9.0, < 2.9.3CPE matchmatch criteria
cpe:2.3:a:apache:pulsar:*:*:*:*:*:*:*:*
2.10.0CPE matchmatch criteria
cpe:2.3:a:apache:pulsar:2.10.0:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 7th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-brokerFixed in: 2.7.5
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-proxyFixed in: 2.7.5
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-brokerFixed in: 2.8.4
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-proxyFixed in: 2.8.4
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-brokerFixed in: 2.9.3
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-proxyFixed in: 2.9.3
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-brokerFixed in: 2.10.1
mavenpatch availablevia ghsa
Product: org.apache.pulsar:pulsar-proxyFixed in: 2.10.1

Vendor Advisories (1)

mavenGHSA-j3qw-g67q-7m64medium

Apache Pulsar Brokers and Proxies vulnerable to Improper Certificate Validation

Sep 25, 2022

References

lists.apache.org / thread/42v5rsxj36r3nhfxhmhb2x12r5jmvx3x
Mailing ListVendor Advisory