VYPR
High severity7.5NVD Advisory· Published Dec 20, 2023· Updated Jun 17, 2026

CVE-2023-37544

CVE-2023-37544

Description

Improper Authentication vulnerability in Apache Pulsar WebSocket Proxy allows an attacker to connect to the /pingpong endpoint without authentication.

This issue affects Apache Pulsar WebSocket Proxy: from 2.8.0 through 2.8.*, from 2.9.0 through 2.9.*, from 2.10.0 through 2.10.4, from 2.11.0 through 2.11.1, 3.0.0.

The known risks include a denial of service due to the WebSocket Proxy accepting any connections, and excessive data transfer due to misuse of the WebSocket ping/pong feature.

2.10 Pulsar WebSocket Proxy users should upgrade to at least 2.10.5. 2.11 Pulsar WebSocket Proxy users should upgrade to at least 2.11.2. 3.0 Pulsar WebSocket Proxy users should upgrade to at least 3.0.1. 3.1 Pulsar WebSocket Proxy users are unaffected. Any users running the Pulsar WebSocket Proxy for 2.8, 2.9, and earlier should upgrade to one of the above patched versions.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
org.apache.pulsar:pulsar-websocketMaven
< 2.10.52.10.5
org.apache.pulsar:pulsar-websocketMaven
>= 2.11.0, < 2.11.22.11.2
org.apache.pulsar:pulsar-websocketMaven
>= 3.0.0, < 3.0.13.0.1

Affected products

4

Patches

Vulnerability mechanics

References

7

News mentions

0

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