🛡️ CVE-2025-30677 — pulsar

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-532 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Apache Pulsar Kafka Connector Logs Sensitive Information in Application Logs

Apache Pulsar contains multiple connectors for integrating with Apache Kafka. The Pulsar IO Apache Kafka Source Connector, Sink Connector, and Kafka Connect Adaptor Sink Connector log sensitive configuration properties in plain text in application logs.

This vulnerability can lead to unintended exposure of credentials in log files, potentially allowing attackers with access to these logs to obtain Apache Kafka credentials. The vulnerability's impact is limited by the fact that an attacker would need access to the application logs to exploit this issue.

This issue affects Apache Pulsar IO's Apache Kafka connectors in all versions before 3.0.11, 3.3.6, and 4.0.4.

3.0.x version users should upgrade to at least 3.0.11.

3.3.x version users should upgrade to at least 3.3.6.

4.0.x version users should upgrade to at least 4.0.4.

Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2025-30677 is classified as CWE-532: Insertion of Sensitive Information into Log File. Sensitive values are written to logs, which are typically kept longer and read more widely than the data warrants.

Affected software

CVE-2025-30677 is recorded against 3 packages.

  • org.apache.pulsar:pulsar-io-kafka (from 4.0.0 up to 4.0.4)
  • org.apache.pulsar:pulsar-io-kafka-connect-adaptor (from 4.0.0 up to 4.0.4)
  • pulsar (from 4.0.0 up to 4.0.4)

Timeline and source

Published on 9 April 2025 and last revised on 15 July 2025. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
lists.apache.org (Web)
pulsar.apache.org (Web)
www.openwall.com (Web)

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE CWE-532
Public Exploit ✅ No
Source NVD
Published 2025-04-09
Updated 2026-08-12
Modified 2025-07-15
Fix URL N/A

Affected Packages

Software From version Fixed in
org.apache.pulsar:pulsar-io-kafka 4.0.0 4.0.4
org.apache.pulsar:pulsar-io-kafka-connect-adaptor 4.0.0 4.0.4
pulsar 4.0.0 4.0.4

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