### Impact
A malicious homeserver could manipulate a user's account data to cause the client to enable URL previews in end-to-end encrypted rooms, in which case any URLs in encrypted messages would be sent to the server.

Even if the CVSS score would be 4.1 ([AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N](https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N&version=3.1)) the maintainer classifies this as High severity issue.

### Patches
This was patched in matrix-react-sdk 3.105.1.

### Workarounds
Deployments that trust their homeservers, as well as closed federations of trusted servers, are not affected.

### References
N/A.

Affected Packages

npm matrix-react-sdk

Affected versions: 0 (fixed in 3.105.1)

Related CVEs

CVE-2024-42347

Key Information

GHSA ID

GHSA-f83w-wqhc-cfp4

Published

August 6, 2024 2:12 PM

Last Modified

August 8, 2024 4:38 PM

CVSS Score

5.0 /10

Primary Ecosystem

npm

Primary Package

matrix-react-sdk

GitHub Reviewed

✓ Yes

Dataset

Last updated: November 26, 2025 6:30 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.