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CVE-2023-29529

20
FAUCET Score

CVE-2023-29529 is a medium-severity vulnerability affecting matrix-js-sdk, the Matrix Client-Server SDK for JavaScript and TypeScript. An attacker in a Matrix group call can eavesdrop on participants' audio and video without their knowledge due to the SDK accepting direct calls from users not yet declared as participants. This vulnerability has a CVSS score of 5.3 (Medium), indicating a network attack vector with low complexity and a potential impact of partial confidentiality loss. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 24.1.0CPE matchmatch criteria
cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

5.0MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 27th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: matrix-js-sdkFixed in: 24.1.0

Vendor Advisories (1)

npmGHSA-6g67-q39g-r79qmedium

matrix-js-sdk vulnerable to invisible eavesdropping in group calls

Apr 14, 2023

References

github.com / matrix-org/matrix-js-sdk/releases/tag/v24.1.0
Release Notes
github.com / matrix-org/matrix-js-sdk/security/advisories/GHSA-6g67-q39g-r79q
Vendor Advisory
github.com / matrix-org/matrix-spec-proposals/pull/3401
Issue TrackingPatch