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CVE-2023-37579

Apache Pulsar Function Worker: Incorrect Authorization for Function Worker Can Leak Sink/Source Credentials

MEDIUM
6.5
CVSS Score
Published: July 12, 2023 at 09:05 AM UTC
Updated: June 17, 2026 at 06:08 AM UTC
1 product affected across 1 vendorPulsar

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Incorrect Authorization vulnerability in Apache Software Foundation Apache Pulsar Function Worker. This issue affects Apache Pulsar: before 2.10.4, and 2.11.0. Any authenticated user can retrieve a source's configuration or a sink's configuration without authorization. Many sources and sinks contain credentials in the configuration, which could lead to leaked credentials. This vulnerability is mitigated by the fact that there is not a known way for an authenticated user to enumerate another tenant's sources or sinks, meaning the source or sink name would need to be guessed in order to exploit this vulnerability. The recommended mitigation for impacted users is to upgrade the Pulsar Function Worker to a patched version. 2.10 Pulsar Function Worker users should upgrade to at least 2.10.4. 2.11 Pulsar Function Worker users should upgrade to at least 2.11.1. 3.0 Pulsar Function Worker users are unaffected. Any users running the Pulsar Function Worker for 2.9.* and earlier should upgrade to one of the above patched versions.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Pulsar· Apachemaven
95%
v < 2.10.42.11.02.11.0 candidate_12.11.0 candidate_5
Affected range stops below 2.10.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryMailing List
Source: [email protected]
https://lists.apache.org/thread/0dmn3cb5n2p08o3cpj3ycfhzfqs2ppwz

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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