- Description
- Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into tool result content rendered by a victim's client.. Mattermost Advisory ID: MMSA-2026-00619
- Source
- responsibledisclosure@mattermost.com
- NVD status
- Analyzed
- Products
- mattermost_server
CVSS 3.1
- Type
- Secondary
- Base score
- 3.5
- Impact score
- 1.4
- Exploitability score
- 2.1
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
- Severity
- LOW
- responsibledisclosure@mattermost.com
- CWE-693
- Hype score
- Not currently trending
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{
"nodes": [
{
"cpeMatch": [
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"matchCriteriaId": "E5D17833-ABB6-4B7C-9A92-67C12D81F03D",
"versionEndExcluding": "10.11.19",
"versionStartIncluding": "10.11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "38954F04-A9D8-47B1-83B8-8D2FE24590F0",
"versionEndExcluding": "11.5.7",
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},
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"versionEndExcluding": "11.6.4",
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"vulnerable": true
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"negate": false,
"operator": "OR"
}
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}
]