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CVE-2023-5330

Denial of Service via Opengraph Data Cache

Medium4.3EPSS 0.60%
Published
Updated
Reserved
Assigned by
Mattermost

Description

Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an attacker to send a specially crafted request to the /api/v4/opengraph filling the cache and turning the server unavailable.

Scores

CVSS scores of CVE-2023-5330, 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 · Modified3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.60% · top 51% of all CVEs (6 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 ≤ 7.8.10
    • affected ≤ 8.0.2
    • affected ≤ 8.1.1
    • unaffected 7.8.11
    • unaffected 8.0.3
    • unaffected 8.1.2

What to do

Solution: Update Mattermost Server to versions 7.8.11, 8.0.3, 8.1.2 or higher.

References (1)

Sources

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

Badge for a README or a ticket

CVE-2023-5330 badge
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Record last updated .