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CVE-2023-2193

Oauth authorization codes do not expire when deauthorizing an oauth2 app

Medium6.5EPSS 0.59%
Published
Updated
Reserved
Assigned by
Mattermost

Description

Mattermost fails to invalidate existing authorization codes when deauthorizing an OAuth2 app, allowing an attacker possessing an authorization code to generate an access token.

Scores

CVSS scores of CVE-2023-2193, by who scored it
Scored byCVSSScoreVector
MattermostCNA (assigner)3.1Medium6.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
NVDNVD · Modified3.1Critical9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS (exploitation in 30 days)
0.59% · top 52% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

Affected products

  • Mattermost · Mattermost

    • affected ≤ 7.1.7
    • affected ≤ 7.7.3
    • affected ≤ 7.8.2
    • affected ≤ 7.9.1
    • unaffected 7.10
    • unaffected 7.9.3
    • unaffected 7.8.4
    • unaffected 7.7.5
    • unaffected 7.1.9

What to do

Solution: Update Mattermost to version v7.10, v7.9.3, v7.8.4, v7.7.5, v7.1.9 or higher.

References (1)

Sources

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

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Record last updated .