CVE-2020-10718: A flaw was found in Wildfly before wildfly-embedded-13.0.0.Final, where the embedded managed process API has a

Q: How do I fix CVE-2020-10718?

jboss fuse: downgrade or apply the listed mitigation; wildfly: upgrade to 13.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-10718 being exploited?

CVE-2020-10718 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-10718 affect?

CVE-2020-10718 affects jboss fuse, wildfly. Severity is high (CVSS 7.5). A flaw was found in Wildfly before wildfly-embedded-13.0.0.Final, where the embedded managed process API has an exposed setting of the Thread Context Classloader (TCCL). This setting is exposed as a public method, which can bypass the secur

Q: How urgent is CVE-2020-10718?

Priority 55/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTDOWNGRADEUPGRADE

CVE-2020-10718 is a high-severity flaw (CVSS 7.5) affecting jboss fuse, wildfly. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Wildfly before wildfly-embedded-13.0.0.Final, where the embedded managed process API has an exposed setting of the Thread Context Classloader (TCCL). This setting is exposed as a public method, which can bypass the security manager. The highest threat from this vulnerability is to confidentiality.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Published	2020-09-16
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

2020-09-16 19:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

redhat jboss fuse DOWNGRADE

Affected: 7.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy jboss-fuse || rpm -q jboss-fuse || jboss-fuse --version

2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison jboss-fuse sudo apt install jboss-fuse=<VERSION_BEFORE_7.0.0> sudo apt-mark hold jboss-fuse

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

dnf --showduplicates list jboss-fuse sudo dnf downgrade jboss-fuse-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add jboss-fuse

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 wildfly UPGRADE

Affected: < 13.0.0

Fixed in: 13.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 13.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wildfly

Note

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

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-2020-10718?

jboss fuse: downgrade or apply the listed mitigation; wildfly: upgrade to 13.0.0. Exact commands for each OS are on this page.

Is CVE-2020-10718 being exploited?

CVE-2020-10718 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-2020-10718 affect?

CVE-2020-10718 affects jboss fuse, wildfly. Severity is high (CVSS 7.5). A flaw was found in Wildfly before wildfly-embedded-13.0.0.Final, where the embedded managed process API has an exposed setting of the Thread Context Classloader (TCCL). This setting is exposed as a public method, which can bypass the secur

How urgent is CVE-2020-10718?

Priority 55/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

JBoss and WildFly vulnerabilities

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References

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