Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to escape some variables that could contain malicious content during error page composition which allows an attacker with access to edit some site configuration to execute some malicious code via injecting some JS as part of those values.. Mattermost Advisory ID: MMSA-2026-00622
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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History
Tue, 19 May 2026 17:45:00 +0000
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Mattermost mattermost Server
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| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost mattermost Server
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Mon, 18 May 2026 15:30:00 +0000
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ssvc
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Mon, 18 May 2026 10:15:00 +0000
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Mattermost
Mattermost mattermost |
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Mattermost
Mattermost mattermost |
Mon, 18 May 2026 08:00:00 +0000
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| Description | Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to escape some variables that could contain malicious content during error page composition which allows an attacker with access to edit some site configuration to execute some malicious code via injecting some JS as part of those values.. Mattermost Advisory ID: MMSA-2026-00622 | |
| Title | Unescaped variables during error page composition | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2026-05-18T06:58:29.673Z
Updated: 2026-05-18T14:33:30.914Z
Reserved: 2026-03-03T17:33:56.666Z
Link: CVE-2026-3495
Updated: 2026-05-18T14:33:26.384Z
Status : Analyzed
Published: 2026-05-18T08:16:13.900
Modified: 2026-05-19T17:37:07.027
Link: CVE-2026-3495
No data.