CVE-2026-2457

| EUVD-2026-12407 MEDIUM
2026-03-16 Mattermost GHSA-ph22-fw5m-w2q9
4.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 16, 2026 - 12:00 vuln.today
EUVD ID Assigned
Mar 16, 2026 - 12:00 euvd
EUVD-2026-12407
CVE Published
Mar 16, 2026 - 11:20 nvd
MEDIUM 4.3

Tags

Information Disclosure Mattermost Suse

Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to sanitize client-supplied post metadata which allows an authenticated attacker to spoof permalink embeds impersonating other users via crafted PUT requests to the post update API endpoint.. Mattermost Advisory ID: MMSA-2025-00569

Analysis

Mattermost fails to properly sanitize client-supplied post metadata in its post update API endpoint, allowing authenticated attackers to spoof permalink embeds and impersonate other users through crafted PUT requests. The vulnerability affects Mattermost versions 11.3.0 and earlier, 11.2.2 and earlier, and 10.11.10 and earlier. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +22
POC: 0

Vendor Status

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CVE-2026-2457 vulnerability details – vuln.today
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