CVE-2021-21320

MediumCVSS 4.3/10Last 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.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-345

Affected software

No affected versions have been published.

Timeline

Published
Mar 2, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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