Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560
{
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "11.1.0"
},
{
"last_affected": "11.1.2"
},
{
"introduced": "10.11.0"
},
{
"last_affected": "10.11.9"
},
{
"introduced": "11.2.0"
},
{
"last_affected": "11.2.1"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13821.json",
"cna_assigner": "Mattermost",
"cwe_ids": [
"CWE-200"
]
}{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"source": "CPE_FIELD",
"extracted_events": [
{
"introduced": "10.11.0"
},
{
"fixed": "10.11.10"
},
{
"introduced": "11.1.0"
},
{
"fixed": "11.1.3"
},
{
"introduced": "11.2.0"
},
{
"fixed": "11.2.2"
}
]
}