AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-21349

MEDIUM · CVSS 6.1 EPSS 46.83% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-03-23 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-21349
Severity
MEDIUM
CVSS
6.1
EPSS
46.83%
Java

Original NVD Description

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.