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NVD / CVE Program· CNA GitHub_M

CVE-2022-39236: Matrix Javascript SDK improper beacon events can cause availability issues

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 71.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: thunderbird (AlmaLinux:8) 102.4.0-1.el8_6.alma; thunderbird (AlmaLinux:9) 102.4.0-1.el9_0.alma; riot-web (Alpine:v3.16) 1.11.7-r0.

Low priority for now. Upgrade to thunderbird (AlmaLinux:8) 102.4.0-1.el8_6.alma; thunderbird (AlmaLinux:9) 102.4.0-1.el9_0.alma; riot-web (Alpine:v3.16) 1.11.7-r0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Starting with version 17.1.0-rc.1, improperly formed beacon events can disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer's ability to process data safely. Note that the matrix-js-sdk can appear to be operating normally but be excluding or corrupting runtime data presented to the consumer. This is patched in matrix-js-sdk v19.7.0. Redacting applicable events, waiting for the sync processor to store data, and restarting the client are possible workarounds. Alternatively, redacting the applicable events and clearing all storage will fix the further perceived issues. Downgrading to an unaffected version, noting that such a version may be subject to other vulnerabilities, will additionally resolve the issue.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Sep 28, 2022
Updated
Jun 17, 2026
EPSS
1.3% · 71th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · GitHub_M
4.3
1.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-39236

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
matrixjavascript sdk

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • matrix javascript sdk17.1.0 and later · before 19.7.0
  • matrix javascript sdk17.1.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • matrix-org matrix-js-sdk

    • >= 17.1.0-rc.1, < 19.7.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8thunderbirdbefore 102.4.0-1.el8_6.alma102.4.0-1.el8_6.alma
AlmaLinux:9thunderbirdbefore 102.4.0-1.el9_0.alma102.4.0-1.el9_0.alma
Alpine:v3.16riot-webbefore 1.11.7-r01.11.7-r0
Alpine:v3.18element-webbefore 1.11.7-r01.11.7-r0
Debian:11node-matrix-js-sdkfrom 0—
npmmatrix-js-sdkfrom 17.1.0-rc.1 · before 19.7.019.7.0
openSUSE:Leap 15.3MozillaThunderbirdbefore 102.4.0-150200.8.85.1102.4.0-150200.8.85.1
openSUSE:Tumbleweedelement-desktopbefore 1.11.8-1.11.11.8-1.1
openSUSE:Tumbleweedelement-webbefore 1.11.8-1.11.11.8-1.1
openSUSE:TumbleweedMozillaThunderbirdbefore 102.3.1-1.1102.3.1-1.1
Red Hat:enterprise_linux:7::clientthunderbirdbefore 0:102.4.0-1.el7_90:102.4.0-1.el7_9
Red Hat:enterprise_linux:7::clientthunderbird-debuginfobefore 0:102.4.0-1.el7_90:102.4.0-1.el7_9
Red Hat:enterprise_linux:8::appstreamthunderbirdbefore 0:102.4.0-1.el8_60:102.4.0-1.el8_6
Red Hat:enterprise_linux:8::appstreamthunderbird-debuginfobefore 0:102.4.0-1.el8_60:102.4.0-1.el8_6
Red Hat:enterprise_linux:8::appstreamthunderbird-debugsourcebefore 0:102.4.0-1.el8_60:102.4.0-1.el8_6
Red Hat:enterprise_linux:9::appstreamthunderbirdbefore 0:102.4.0-1.el9_00:102.4.0-1.el9_0
Red Hat:enterprise_linux:9::appstreamthunderbird-debuginfobefore 0:102.4.0-1.el9_00:102.4.0-1.el9_0
Red Hat:enterprise_linux:9::appstreamthunderbird-debugsourcebefore 0:102.4.0-1.el9_00:102.4.0-1.el9_0
Red Hat:rhel_e4s:8.1::appstreamthunderbirdbefore 0:102.4.0-1.el8_10:102.4.0-1.el8_1
Red Hat:rhel_e4s:8.1::appstreamthunderbird-debuginfobefore 0:102.4.0-1.el8_10:102.4.0-1.el8_1
Red Hat:rhel_e4s:8.1::appstreamthunderbird-debugsourcebefore 0:102.4.0-1.el8_10:102.4.0-1.el8_1
Red Hat:rhel_eus:8.2::appstreamthunderbirdbefore 0:102.4.0-1.el8_20:102.4.0-1.el8_2
Red Hat:rhel_eus:8.2::appstreamthunderbird-debuginfobefore 0:102.4.0-1.el8_20:102.4.0-1.el8_2
Red Hat:rhel_eus:8.2::appstreamthunderbird-debugsourcebefore 0:102.4.0-1.el8_20:102.4.0-1.el8_2

+6

Same product

matrix: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-28427Prototype pollution in matrix-js-sdk
    32Monitor
  • CVE-2022-39250Matrix JavaScript SDK vulnerable to key/device identifier confusion in SAS verification
    30Monitor
  • CVE-2022-39251Matrix Javascript SDK vulnerable to Olm/Megolm protocol confusion
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-40823Sep 13, 2021 · A logic error in the room key sharing functionality of matrix-js-sdk (aka Matrix Javascript SDK) before 12.4.1 allows a malicious Matrix hom
    23Monitor
  • Later →CVE-2022-39249Sep 28, 2022 · Matrix Javascript SDK vulnerable to impersonation via forwarded Megolm sessions
    30Monitor
  • Later →CVE-2022-36059Mar 28, 2023 · Prototype pollution in matrix-js-sdk
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:thunderbird102.4.0-1.el9_0.alma · AlmaLinux:9Package registry (OSV)
alpine:element-web1.11.7-r0 · Alpine:v3.18Package registry (OSV)
alpine:riot-web1.11.7-r0 · Alpine:v3.16Package registry (OSV)
npm:matrix-js-sdk19.7.0Package registry (OSV)
opensuse:element-desktop1.11.8-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:element-web1.11.8-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:MozillaThunderbird102.4.0-150200.8.85.1 · openSUSE:Leap 15.3Package registry (OSV)
red hat:thunderbird0:102.4.0-1.el9_0 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:thunderbird-debuginfo0:102.4.0-1.el9_0 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:thunderbird-debugsource0:102.4.0-1.el9_0 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:thunderbird0:102.4.0-1.el8_6 · Rocky Linux:8Package registry (OSV)
suse:MozillaThunderbird102.4.0-150200.8.85.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records