CVE-2021-21320

User content sandbox can be confused into opening arbitrary documents

Published Mar 2, 2021 CVSS 3.1 · 2.6 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-0602 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.
Github GHSA Github GHSA GHSA-52mq-6jcv-j79x User content sandbox can be confused into opening arbitrary documents
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 3, 2024, 6:09 PM
Reserved
Dec 22, 2020, 12:00 AM
Status
Modified
Published
Mar 2, 2021, 3:15 AM
Modified
Jun 17, 2026, 3:35 AM