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User content sandbox can be confused into opening arbitrary documents

Low severity GitHub Reviewed Published Mar 1, 2021 in matrix-org/matrix-react-sdk • Updated Feb 1, 2023

Package

npm matrix-react-sdk (npm)

Affected versions

< 3.15.0

Patched versions

3.15.0

Description

Impact

The user content sandbox can be abused to trick users into opening unexpected documents after several user interactions. The content can be opened with a blob origin from the Matrix client, so it is possible for a malicious document to access user messages and secrets.

Patches

This has been fixed by matrix-org/matrix-react-sdk#5657, which is included in 3.15.0.

Workarounds

There are no known workarounds.

References

@jryans jryans published to matrix-org/matrix-react-sdk Mar 1, 2021
Reviewed Mar 2, 2021
Published by the National Vulnerability Database Mar 2, 2021
Published to the GitHub Advisory Database Mar 3, 2021
Last updated Feb 1, 2023

Severity

Low
2.6
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N

Weaknesses

CVE ID

CVE-2021-21320

GHSA ID

GHSA-52mq-6jcv-j79x

Source code

No known source code

Credits

Checking history
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