CVE-2021-21320

—

CVSS 3.1

4.3 medium

EPSS

<1%p58

Published

Mar 2, 2021 (Mar 2, 2021)

Modified

Jun 17, 2026

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.

Vendors: matrix-react-sdk project
Products: matrix-react-sdk
Weakness: CWE-345
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.9%)

In the news0 stories

No ingested article mentions this CVE yet.