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CVE-2021-33790 Details

Description

The RebornCore library before 4.7.3 allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of reborncore.common.network.ExtendedPacketBuffer. An attacker can instantiate any class on the classpath with any data. A class usable for exploitation might or might not be present, depending on what Minecraft modifications are installed.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/TechReborn/RebornCore/security/advisories/GHSA-r7pg-4xrf-7mrm	CVE	Third Party Advisory
https://vuln.ryotak.me/advisories/45	CVE	Third Party Advisory
https://www.curseforge.com/minecraft/mc-mods/reborncore	CVE	ProductThird Party Advisory
https://github.com/TechReborn/RebornCore/security/advisories/GHSA-r7pg-4xrf-7mrm	[email protected]	Third Party Advisory
https://vuln.ryotak.me/advisories/45	[email protected]	Third Party Advisory
https://www.curseforge.com/minecraft/mc-mods/reborncore	[email protected]	ProductThird Party Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-502	Deserialization of Untrusted Data	[email protected]

Affected Products

Product	Versions
techreborn reborncore	<= 3.13.8 >= 3.19.0, < 3.19.5 >= 4.2.0, < 4.2.10 >= 4.7.0, < 4.7.3
CPE cpe:2.3:a:techreborn:reborncore:::::::: Remediation No remediation found in references.
minecraft minecraft	All versions
CPE cpe:2.3:a:minecraft:minecraft:-:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jun 11, 2021	Initial Analysis	[email protected]