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Case File

CVE-2021-21320

LOW · CVSS 2.6 EPSS 0.92% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-03-02 · 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
github.com ↗ github.com ↗ github.com ↗

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

CVE
CVE-2021-21320
Severity
LOW
CVSS
2.6
EPSS
0.92%
Java

Original NVD Description

matrix-react-sdk is an npm package which is a Matrix SDK for React Javascript. In matrix-react-sdk before version 3.15.0, the user content sandbox can be abused to trick users into opening unexpected documents. The content is opened with a `blob` origin that cannot access Matrix user data, so messages and secrets are not at risk. This has been fixed in version 3.15.0.