CVE-2024-41565: JustEnoughItems (JEI) 19.5.0.33 and before contains an Improper Validation of Specified Index, Position, or Of

Routine

MEDIUM 4.3UPGRADE

CVE-2024-41565 is a medium-severity flaw (CVSS 4.3) affecting justenoughitems. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JustEnoughItems (JEI) 19.5.0.33 and before contains an Improper Validation of Specified Index, Position, or Offset in Input vulnerability. The specific issue is a failure to validate slot index in JEI for Minecraft, which allows in-game item duplication.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-129, CWE-20
Published	2024-08-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mezz

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

Am I affected?

Timeline

2024-08-28 17:15 UTCPublished CVE record published
2026-06-17 07:47 UTCUpdated Record last modified

mezz justenoughitems UPGRADE

Affected: < 11.6.0.1021 · >= 12.0.0 and < 13.1.0.18 · >= 14.0.0 and < 15.8.0.11 · >= 16.0.0 and < 19.5.0.34

Fixed in: 11.6.0.1021, 13.1.0.18, 15.8.0.11, 19.5.0.34

Safe to downgrade to: a release before 12.0.0

1. Check installed version

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

2. UPGRADE to 11.6.0.1021 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade justenoughitems

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 12.0.0 (Debian / Ubuntu)

apt-cache madison justenoughitems sudo apt install justenoughitems=<VERSION_BEFORE_12.0.0> sudo apt-mark hold justenoughitems

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

dnf --showduplicates list justenoughitems sudo dnf downgrade justenoughitems-<VERSION_BEFORE_12.0.0> sudo dnf versionlock add justenoughitems

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-2024-41565?

justenoughitems: upgrade to 11.6.0.1021, 13.1.0.18, 15.8.0.11, 19.5.0.34. Exact commands for each OS are on this page.

Is CVE-2024-41565 being exploited?

CVE-2024-41565 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-2024-41565 affect?

CVE-2024-41565 affects justenoughitems. Severity is medium (CVSS 4.3). JustEnoughItems (JEI) 19.5.0.33 and before contains an Improper Validation of Specified Index, Position, or Offset in Input vulnerability. The specific issue is a failure to validate slot index in JEI for Minecraft, which allows in-game ite

How urgent is CVE-2024-41565?

Priority 21/100. No elevated risk signals yet.

References

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