Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
{
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "10.5.0"
},
{
"last_affected": "10.5.2"
},
{
"introduced": "9.11.0"
},
{
"last_affected": "9.11.11"
}
],
"source": "AFFECTED_FIELD"
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/2xxx/CVE-2025-2527.json"
}