PT-2021-20328 · Bdew · Bdew Bdlib Library

Ryotak · Published 2021-06-03 · Updated 2025-11-02 · CVE-2021-33806

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: BDew BdLib library versions prior to 1.16.1.7

Description: The issue allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of its use of Java serialization.

Recommendations: For versions prior to 1.16.1.7, update to version 1.16.1.7 or later to resolve the issue. As a temporary workaround, consider restricting the use of Java serialization to minimize the risk of exploitation.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2021-33806

Affected Products

Bdew Bdlib Library

References · 9

• https://github.com/bdew-minecraft/bdlib/commit/447210530ceec72fb3374efecb0930ed359d2297 · Patch
• https://osv.dev/vulnerability/CVE-2021-33806 · Vendor Advisory
• https://bdew.net · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33806 · Security Note
• https://reddit.com/r/VPNforFreedom/comments/1omc7cj/best_vpns_for_plex · Reddit Post
• https://curseforge.com/minecraft/mc-mods/bdlib/files/3331330 · Note
• https://vuln.ryotak.me/advisories/46 · Note
• https://t.me/cvenotify/15501 · Telegram Post
• https://t.me/cvenotify/16284 · Telegram Post