CVE-2020-10740: A vulnerability was found in Wildfly in versions before 20.0.0.Final, where a remote deserialization attack is

Q: How do I fix CVE-2020-10740?

wildfly: upgrade to 20.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-10740 being exploited?

CVE-2020-10740 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-2020-10740 affect?

CVE-2020-10740 affects wildfly. Severity is medium (CVSS 6.6). A vulnerability was found in Wildfly in versions before 20.0.0.Final, where a remote deserialization attack is possible in the Enterprise Application Beans(EJB) due to lack of validation/filtering capabilities in wildfly.

Q: How urgent is CVE-2020-10740?

Priority 48/100. On your watchlist

This month

MEDIUM 6.6WATCHLISTUPGRADE

CVE-2020-10740 is a medium-severity flaw (CVSS 6.6) affecting wildfly. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Wildfly in versions before 20.0.0.Final, where a remote deserialization attack is possible in the Enterprise Application Beans(EJB) due to lack of validation/filtering capabilities in wildfly.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-502
Published	2020-06-22
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

2020-06-22 18:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

redhat wildfly UPGRADE

Affected: < 20.0.0

Fixed in: 20.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 20.0.0 (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-2020-10740?

wildfly: upgrade to 20.0.0. Exact commands for each OS are on this page.

Is CVE-2020-10740 being exploited?

CVE-2020-10740 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-2020-10740 affect?

CVE-2020-10740 affects wildfly. Severity is medium (CVSS 6.6). A vulnerability was found in Wildfly in versions before 20.0.0.Final, where a remote deserialization attack is possible in the Enterprise Application Beans(EJB) due to lack of validation/filtering capabilities in wildfly.

How urgent is CVE-2020-10740?

Priority 48/100. On your watchlist

Software pages

JBoss and WildFly vulnerabilities

Related CVEs

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CVE-2022-1278 HIGH 7.5 UPGRADE DOWNGRADE A flaw was found in WildFly, where an attacker can see deployment names, endpoints, and any other data the tra
CVE-2022-0866 MEDIUM 5.3 DOWNGRADE DOWNGRADE This is a concurrency issue that can result in the wrong caller principal being returned from the session cont
CVE-2021-3644 LOW 3.3 DOWNGRADE DOWNGRADE A flaw was found in wildfly-core in all versions
CVE-2021-3503 MEDIUM 4.3 UPGRADE A flaw was found in Wildfly where insufficient RBAC restrictions may lead to expose metrics data

References

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