CVE-2021-28168: Eclipse Jersey 2.28 to 2.33 and Eclipse Jersey 3.0.0 to 3.0.1 contains a local information disclosure vulnerab

Routine

MEDIUM 6.2UPGRADEDOWNGRADEDOWNGRADE

CVE-2021-28168 is a medium-severity flaw (CVSS 6.2) affecting jersey, communications cloud native core policy, communications cloud native core unified data repository. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Eclipse Jersey 2.28 to 2.33 and Eclipse Jersey 3.0.0 to 3.0.1 contains a local information disclosure vulnerability. This is due to the use of the File.createTempFile which creates a file inside of the system temporary directory with the permissions: -rw-r--r--. Thus the contents of this file are viewable by all other users locally on the system. As such, if the contents written is security sensitive, it can be disclosed to other local users.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-378, CWE-379, CWE-668
Published	2021-04-22
Last modified	2026-06-17

Publisher (CNA): Eclipse Foundation · Vendor: eclipse · oracle

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

Am I affected?

Timeline

2021-04-22 18:15 UTCPublished CVE record published
2026-06-17 03:45 UTCUpdated Record last modified

eclipse jersey UPGRADE

Affected: >= 2.28 and < 2.34 · >= 3.0.0 and < 3.0.2

Fixed in: 2.34, 3.0.2

Safe to downgrade to: a release before 2.28

1. Check installed version

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

2. UPGRADE to 2.34 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jersey

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 2.28 (Debian / Ubuntu)

apt-cache madison jersey sudo apt install jersey=<VERSION_BEFORE_2.28> sudo apt-mark hold jersey

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

dnf --showduplicates list jersey sudo dnf downgrade jersey-<VERSION_BEFORE_2.28> sudo dnf versionlock add jersey

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.

oracle communications cloud native core policy DOWNGRADE

Affected: 1.15.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.15.0

1. Check installed version

apt-cache policy communications-cloud-native-core-policy || rpm -q communications-cloud-native-core-policy || communications-cloud-native-core-policy --version

2. No fixed release: DOWNGRADE to a release before 1.15.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-policy sudo apt install communications-cloud-native-core-policy=<VERSION_BEFORE_1.15.0> sudo apt-mark hold communications-cloud-native-core-policy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list communications-cloud-native-core-policy sudo dnf downgrade communications-cloud-native-core-policy-<VERSION_BEFORE_1.15.0> sudo dnf versionlock add communications-cloud-native-core-policy

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.

oracle communications cloud native core unified data repository DOWNGRADE

Affected: 1.15.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.15.0

1. Check installed version

apt-cache policy communications-cloud-native-core-unified-data-repository || rpm -q communications-cloud-native-core-unified-data-repository || communications-cloud-native-core-unified-data-repository --version

2. No fixed release: DOWNGRADE to a release before 1.15.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-unified-data-repository sudo apt install communications-cloud-native-core-unified-data-repository=<VERSION_BEFORE_1.15.0> sudo apt-mark hold communications-cloud-native-core-unified-data-repository

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list communications-cloud-native-core-unified-data-repository sudo dnf downgrade communications-cloud-native-core-unified-data-repository-<VERSION_BEFORE_1.15.0> sudo dnf versionlock add communications-cloud-native-core-unified-data-repository

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-2021-28168?

jersey: upgrade to 2.34, 3.0.2; communications cloud native core policy: downgrade or apply the listed mitigation; communications cloud native core unified data repository: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-28168 being exploited?

CVE-2021-28168 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-2021-28168 affect?

CVE-2021-28168 affects jersey, communications cloud native core policy, communications cloud native core unified data repository. Severity is medium (CVSS 6.2). Eclipse Jersey 2.28 to 2.33 and Eclipse Jersey 3.0.0 to 3.0.1 contains a local information disclosure vulnerability. This is due to the use of the File.createTempFile which creates a file inside of the system temporary directory with the pe

How urgent is CVE-2021-28168?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2025-12383 HIGH 7.4 DOWNGRADE In Eclipse Jersey versions 2.45, 3.0.16, 3.1.9 a race condition can cause ignoring of critical SSL configurati
CVE-2014-3643 HIGH 7.5 MITIGATE jersey: XXE via parameter entities not disabled by the jersey SAX parser

References

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