CVE-2025-30677: Apache Pulsar contains multiple connectors for integrating with Apache Kafka

This month

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2025-30677 is a medium-severity flaw (CVSS 6.5) affecting pulsar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 i

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-532
Published	2025-04-09
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-09 12:15 UTCPublished CVE record published
2026-06-17 09:09 UTCUpdated Record last modified

apache pulsar UPGRADE

Affected: >= 2.3.0 and < 3.0.11 · >= 3.3.0 and < 3.3.6 · >= 4.0.0 and < 4.0.4

Fixed in: 3.0.11, 3.3.6, 4.0.4

Safe to downgrade to: a release before 2.3.0

1. Check installed version

apt-cache policy pulsar || rpm -q pulsar || pulsar --version

2. UPGRADE to 3.0.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pulsar

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pulsar

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.3.0 (Debian / Ubuntu)

apt-cache madison pulsar sudo apt install pulsar=<VERSION_BEFORE_2.3.0> sudo apt-mark hold pulsar

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pulsar sudo dnf downgrade pulsar-<VERSION_BEFORE_2.3.0> sudo dnf versionlock add pulsar

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-30677?

pulsar: upgrade to 3.0.11, 3.3.6, 4.0.4. Exact commands for each OS are on this page.

Is CVE-2025-30677 being exploited?

CVE-2025-30677 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-30677 affect?

CVE-2025-30677 affects pulsar. Severity is medium (CVSS 6.5). 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 appl

How urgent is CVE-2025-30677?

Priority 41/100. On your watchlist

Software pages

Apache Kafka vulnerabilities

References

← Back to latest CVEs