CVE-2021-33790

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    CVE-2021-33790

    Published: 31 May 2021Last Modified: 10 Mar 2026

    Summary:

    Details: 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.

    References: , https://github.com/TechReborn/RebornCore/security/advisories/GHSA-r7pg-4xrf-7mrm, https://vuln.ryotak.me/advisories/45, https://www.curseforge.com/minecraft/mc-mods/reborncore

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-33790 | CVE-DB