HOMEVULNERABILITIESCVE-2024-42347
MEDIUM

CVE-2024-42347

CWE-359Published: August 6, 2024· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2024-42347 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

matrix1 product(s)
matrix-react-sdk
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-f83w-wqhc-cfp4

All References (2)

→
https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.105.1Release Notes
→
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-f83w-wqhc-cfp4Vendor Advisory

Quick Facts

CVE IDCVE-2024-42347
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-359
CISA KEVNo
Affected1 vendor(s)
PublishedAug 6, 2024

Related CVEs (CWE-359)

CVE-2023-36018
9.8
CVE-2025-15623
9.3
CVE-2024-49765
9.1
CVE-2022-2921
8.8
CVE-2025-53625
8.7
CVE-2023-36052
8.6

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2024-42347 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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