CVE-2021-20306: A flaw was found in the BPMN editor in version jBPM 7.51.0.Final

Routine

MEDIUM 4.3WATCHLISTDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2021-20306 is a medium-severity flaw (CVSS 4.3) affecting descision manager, jbpm, process automation. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in the BPMN editor in version jBPM 7.51.0.Final. Any authenticated user from any project can see the name of Ruleflow Groups from other projects, despite the user not having access to those projects. The highest threat from this vulnerability is to confidentiality.

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-863
Published	2021-06-01
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

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

Am I affected?

Timeline

2021-06-01 14:15 UTCPublished CVE record published
2026-06-17 03:33 UTCUpdated Record last modified

redhat descision manager DOWNGRADE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

1. Check installed version

apt-cache policy descision-manager || rpm -q descision-manager || descision-manager --version

2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)

apt-cache madison descision-manager sudo apt install descision-manager=<VERSION_BEFORE_7.0> sudo apt-mark hold descision-manager

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

dnf --showduplicates list descision-manager sudo dnf downgrade descision-manager-<VERSION_BEFORE_7.0> sudo dnf versionlock add descision-manager

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.

redhat jbpm DOWNGRADE

Affected: 7.51.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.51.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.51.0 (Debian / Ubuntu)

apt-cache madison jbpm sudo apt install jbpm=<VERSION_BEFORE_7.51.0> sudo apt-mark hold jbpm

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

dnf --showduplicates list jbpm sudo dnf downgrade jbpm-<VERSION_BEFORE_7.51.0> sudo dnf versionlock add jbpm

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.

redhat process automation DOWNGRADE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

1. Check installed version

apt-cache policy process-automation || rpm -q process-automation || process-automation --version

2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)

apt-cache madison process-automation sudo apt install process-automation=<VERSION_BEFORE_7.0> sudo apt-mark hold process-automation

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

dnf --showduplicates list process-automation sudo dnf downgrade process-automation-<VERSION_BEFORE_7.0> sudo dnf versionlock add process-automation

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-2021-20306?

descision manager: downgrade or apply the listed mitigation; jbpm: downgrade or apply the listed mitigation; process automation: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-20306 being exploited?

CVE-2021-20306 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-2021-20306 affect?

CVE-2021-20306 affects descision manager, jbpm, process automation. Severity is medium (CVSS 4.3). A flaw was found in the BPMN editor in version jBPM 7.51.0.Final. Any authenticated user from any project can see the name of Ruleflow Groups from other projects, despite the user not having access to those projects. The highest threat from

How urgent is CVE-2021-20306?

Priority 33/100. On your watchlist

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References

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