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CVE-2025-55073: mattermost server from 10.5.0 (inclusive), before 10.5.12 (exclusive), from 10.11.0 (inclusive), before 10.11.4…
CVE-2025-55073. CVSS 3.1 base score 5.3 (MEDIUM, NVD). EPSS 0.00196 (percentile 0.08662), scored 17-Oct-2026.
Affected technology
mattermost server · from 10.5.0 (inclusive), before 10.5.12 (exclusive)
mattermost
mattermost server · from 10.11.0 (inclusive), before 10.11.4 (exclusive)
mattermost
mattermost server · from 10.12.0 (inclusive), before 10.12.1 (exclusive)
mattermost
Mattermost · 10.11.0 through 10.11.3, 10.5.0 through 10.5.11, 10.12.0 through 10.12.0
Mattermost
Description’s affected range: versions 10.11.x <= 10.11.3
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required
Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
An attacker can edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL. Vendor/CNA’s CVSS 3.1 assessment (base score 5.4/10) rates confidentiality impact as none; integrity and availability impact as low. NVD’s CVSS 3.1 assessment (base score 5.3/10) rates confidentiality and availability impact as none; integrity impact as low.
- CWE
- CWE-306
- CCR priority
- 21.2 /100 (P4)
- CVSS 3.1
- 5.3 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · NVD
- EPSS
- 0.00196 · percentile 0.08662 · 2026-10-17
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-19 14:02:10.907757+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2025-55073.html