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Fencer Vulns
medium 4.3

CVE-2022-4044 json

Authenticated user could send multiple requests containing a large Auto Responder Message payload and can crash a Mattermost server

published 2022-11-23 3 y ago modified 2026-06-17 4 mo ago also GHSA-5jph-wrq7-v9hf , EUVD-2022-7242

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

A denial-of-service vulnerability in Mattermost allows an authenticated user to crash the server via multiple large autoresponder messages.

Patch / fix

  • go github.com/mattermost/mattermost-server 7.1.4, 7.2.1, 7.3.1
  • Mattermost Mattermost 7.1.4, 7.2.1, 7.3.1, 7.4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/1680241 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost-server
<7.1.4
>=7.2.0, <7.2.1
>=7.3.0, <7.3.1
7.1.4
7.2.1
7.3.1

Affected products

  • Mattermost Mattermost

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.