Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27933.json",
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "10.4.0"
},
{
"last_affected": "10.4.2"
},
{
"introduced": "10.3.0"
},
{
"last_affected": "10.3.3"
},
{
"introduced": "9.11.0"
},
{
"last_affected": "9.11.8"
}
],
"source": "AFFECTED_FIELD"
}
]
}{
"extracted_events": [
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.9"
},
{
"introduced": "10.3.0"
},
{
"fixed": "10.3.4"
},
{
"introduced": "10.4.0"
},
{
"fixed": "10.4.3"
}
],
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*"
}