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
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
History
Wed, 18 Mar 2026 18:00:00 +0000
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| First Time appeared |
Mattermost
Mattermost mattermost Server |
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| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost
Mattermost mattermost Server |
Mon, 16 Mar 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Mon, 16 Mar 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 | |
| Title | WebSocket Message Spoofing via Permalink Embed Manipulation | |
| Weaknesses | CWE-346 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: Mattermost
Published: 2026-03-16T11:20:25.335Z
Updated: 2026-03-16T13:49:57.761Z
Reserved: 2026-02-13T11:06:55.712Z
Link: CVE-2026-2457
Updated: 2026-03-16T13:44:16.018Z
Status : Analyzed
Published: 2026-03-16T14:19:29.367
Modified: 2026-03-18T17:49:10.550
Link: CVE-2026-2457
No data.