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CVE-2024-2446

Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to limit the number of…

Medium4.3EPSS 0.45%
Published
Updated
Reserved
Assigned by
Mattermost

Description

Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to limit the number of @-mentions processed per message, allowing an authenticated attacker to crash the client applications of other users via large, crafted messages.

Timeline

  1. ID reserved

    By Mattermost

  2. · 1 day later

    Published

  3. · 5 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2024-2446, by who scored it
Scored byCVSSScoreVector
MattermostCNA (assigner)3.1Medium4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVDNVD · Analyzed3.1Medium4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS (exploitation in 30 days)
0.45% · top 61% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

Affected products

  • Mattermost · Mattermost

    • affected 9.4.0 – ≤ 9.4.2
    • affected 9.3.0 – ≤ 9.3.1
    • affected 9.2.0 – ≤ 9.2.5
    • affected 8.1.0 – ≤ 8.1.9
    • unaffected 9.5.0
    • unaffected 9.4.3
    • unaffected 9.3.2
    • unaffected 9.2.6
    • unaffected 8.1.10

What to do

Solution: Update Mattermost Server to versions 9.5, 9.4.3, 9.3.2, 9.2.6, 8.1.10 or higher.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .