CVE-2025-49222 — Mattermost Shared Channel Upload Type Validation Bypass

Description (CNA)

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 10.8.0 through 10.8.3; affected 10.5.0 through 10.5.8; affected 9.11.0 through 9.11.17; affected 10.9.0 through 10.9.2; affected 10.10.0 through 10.10.0; unaffected 10.11.0; unaffected 10.8.4; unaffected 10.5.9; unaffected 9.11.18; unaffected 10.9.3; unaffected 10.10.1

CWE

CWE-434

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.