🛡️ CVE-2023-2515 — mattermost

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: High — administrative rights are needed first.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
• Integrity impact: Low — limited, and the attacker does not choose what is affected.
• Availability impact: Low — limited, and the attacker does not choose what is affected.

Weakness class

CVE-2023-2515 is classified as CWE-863: Incorrect Authorization. An authorisation check runs but reaches the wrong conclusion, permitting actions it should refuse.

Affected software

CVE-2023-2515 is recorded against 3 packages.

• github.com/mattermost/mattermost-server/v6
• mattermost
• mattermost-server (from 7.9.0 up to 7.9.2)

Timeline and source

Published on 12 May 2023 and last revised on 6 December 2023. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Package)
mattermost.com (Web)

Other advisories for this package

github.com/mattermost/mattermost-server/v6 has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-4915 (published 7 Jul 2026)
• CVE-2026-5740 (published 7 Jul 2026)
• CVE-2026-28759 (published 25 Jun 2026)
• CVE-2026-6340 (published 25 Jun 2026)
• CVE-2026-3590 (published 25 Jun 2026)
• CVE-2026-4286 (published 25 Jun 2026)
• CVE-2026-28741 (published 25 Jun 2026)
• CVE-2026-6339 (published 25 Jun 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-863: Incorrect Authorization) in other software:

• CVE-2025-14562 (2.0 Low, published 17 Aug 2026)
• CVE-2025-30238 (published 10 Aug 2026)
• CVE-2025-15674 (2.7 Low, published 6 Aug 2026)
• CVE-2025-10656 (9.8 Critical, published 29 Jul 2026)
• CVE-2024-24779 (5.0 Medium, published 7 Jul 2026)
• CVE-2024-26016 (5.0 Medium, published 7 Jul 2026)
• CVE-2024-23823 (4.2 Medium, published 7 Jul 2026)
• CVE-2023-32672 (5.0 Medium, published 7 Jul 2026)

Details

Affected Packages

References