CVE-2022-39236Network attack vector

Client event-processing disruption via missing location validation

Published Sep 28, 2022 · Updated Apr 23, 2025

Improper input validation in matrix-js-sdk 17.1.0-rc.1 and later before 19.7.0 allows remote authenticated users to disrupt event processing. The parseBeaconContent helper destructures location fields returned by M_LOCATION.findIn without checking whether malformed content omitted the location object, causing an exception. A Matrix room participant can supply the event; affected clients can appear operational while excluding or corrupting runtime data.

CVSS severity4.3
Medium
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in matrix-js-sdk 17.1.0-rc.1 and later before 19.7.0 allows remote authenticated users to disrupt event processing. The parseBeaconContent helper destructures location fields returned by M_LOCATION.findIn without checking whether malformed content omitted the location object, causing an exception. A Matrix room participant can supply the event; affected clients can appear operational while excluding or corrupting runtime data.

The record

CVE
CVE-2022-39236
Published
Sep 28, 2022
Updated
Apr 23, 2025
Vendor
The Matrix.org Foundation
Product
matrix-js-sdk
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 17.1.0-rc.1, < 19.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Matrix.org Foundation · matrix-js-sdkversion=>= 17.1.0-rc.1, < 19.7.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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