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CVE-2024-42347

20
FAUCET Score

CVE-2024-42347 affects matrix-react-sdk, allowing a malicious homeserver to force URL previews in end-to-end encrypted rooms, sending URLs from encrypted messages to the server. This medium-severity vulnerability (CVSS 6.5) has a network attack vector and low attack complexity, potentially leading to high confidentiality impact by exposing sensitive URLs. There is no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.105.1CPE matchmatch criteria
cpe:2.3:a:matrix:matrix-react-sdk:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 45th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

npmpatch availablevia ghsa
Product: matrix-react-sdkFixed in: 3.105.1
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-f83w-wqhc-cfp4medium

Matrix SDK for React's URL preview setting for a room is controllable by the homeserver

Aug 6, 2024

References

github.com / matrix-org/matrix-react-sdk/releases/tag/v3.105.1
Release Notes
github.com / matrix-org/matrix-react-sdk/security/advisories/GHSA-f83w-wqhc-cfp4
Vendor Advisory