What is CVE-2024-42347?

CVE-2024-42347 is a high-severity vulnerability in Matrix Matrix-React-Sdk, classified under Exposure of Private Personal Information to an Unauthorized Actor. CVSS score: 7.7/10. Published 2024-08-06.

How severe is CVE-2024-42347?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Matrix Matrix-React-Sdk

CVE-2024-42347

matrix-react-sdk is a react-based SDK for inserting a Matrix chat/voip client into a web page. 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. This was patched in matrix-react-sdk 3.105.0. Deployments that trust their homeservers, as well as closed federations of trusted servers, are not affected. Users are advised to upgrade. There are no known workarounds for this vulnerability.

EPSS: 0.004 (35.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Matrix Matrix-react-sdk
Matrix-org Matrix-react-sdk — versions < 3.105.1

Weakness classification (CWE)

CWE-359 — Exposure of Private Personal Information to an Unauthorized Actor

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2024-42347?: CVE-2024-42347 is a high-severity vulnerability in Matrix Matrix-React-Sdk, classified under Exposure of Private Personal Information to an Unauthorized Actor. CVSS score: 7.7/10. Published 2024-08-06.
How severe is CVE-2024-42347?: High severity. CVSS v3 base score is 7.7 out of 10.