| CVE-2019-20866 | MOYENNE5.3 | An issue was discovered in Mattermost Server before 5.12.0. Use of a Proxy HTTP header, rather than the source address in an IP packet header, for obtaining IP address information was mishandled. | 19/06/2020 |
| CVE-2019-20865 | ÉLEVÉE8.8 | An issue was discovered in Mattermost Server before 5.12.0, 5.11.1, 5.10.2, 5.9.2, and 4.10.10. The login page allows CSRF. | 19/06/2020 |
| CVE-2019-20863 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.13.0. Incoming webhook creation is not properly restricted. | 19/06/2020 |
| CVE-2019-20862 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.13.0. Non-members may fetch a team's slash commands. | 19/06/2020 |
| CVE-2019-20860 | MOYENNE5.5 | An issue was discovered in Mattermost Server before 5.14.0, 5.13.3, 5.12.6, and 5.9.4. It allows remote attackers to cause a denial of service (application hang) via a crafted SVG document. | 19/06/2020 |
| CVE-2019-20859 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.15.0. Login access control can be bypassed via crafted input. | 19/06/2020 |
| CVE-2019-20858 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.15.0. It allows attackers to cause a denial of service (CPU consumption) via crafted characters in a SQL LIKE clause to an APIv4 endpoint. | 19/06/2020 |
| CVE-2019-20857 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.16.0. It allows attackers to cause a denial of service (markdown renderer hang) via many backtick characters. | 19/06/2020 |
| CVE-2019-20855 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.16.1, 5.15.2, 5.14.5, and 5.9.6. It allows attackers to obtain sensitive information (local files) during legacy attachment migration. | 19/06/2020 |
| CVE-2019-20854 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.17.0. It allows remote attackers to cause a denial of service (client-side application crash) via a LaTeX message. | 19/06/2020 |
| CVE-2020-14460 | MOYENNE6.5 | An issue was discovered in Mattermost Server before 5.19.0, 5.18.1, 5.17.3, 5.16.5, and 5.9.8. Creation of a trusted OAuth application does not always require admin privileges, aka MMSA-2020-0001. | 19/06/2020 |
| CVE-2020-14459 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.19.0. Attackers can rename a channel and cause a collision with a direct message, aka MMSA-2020-0002. | 19/06/2020 |
| CVE-2020-14458 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.19.0. Attackers can discover private channels via the "get channel by name" API, aka MMSA-2020-0004. | 19/06/2020 |
| CVE-2020-14457 | MOYENNE5.3 | An issue was discovered in Mattermost Server before 5.20.0. Non-members can receive broadcasted team details via the update_team WebSocket event, aka MMSA-2020-0012. | 19/06/2020 |
| CVE-2020-14453 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.21.0. Socket read operations are not appropriately restricted, which allows attackers to cause a denial of service, aka MMSA-2020-0005. | 19/06/2020 |
| CVE-2020-14452 | MOYENNE5.3 | An issue was discovered in Mattermost Server before 5.21.0. mmctl allows directory traversal via HTTP, aka MMSA-2020-0014. | 19/06/2020 |
| CVE-2020-14450 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.22.0. The markdown renderer allows attackers to cause a denial of service (client-side), aka MMSA-2020-0017. | 19/06/2020 |
| CVE-2020-14448 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.23.0. Automatic direct message replies allow attackers to cause a denial of service (infinite loop), aka MMSA-2020-0020. | 19/06/2020 |
| CVE-2020-14447 | ÉLEVÉE7.5 | An issue was discovered in Mattermost Server before 5.23.0. Large webhook requests allow attackers to cause a denial of service (infinite loop), aka MMSA-2020-0021. | 19/06/2020 |
| CVE-2019-20847 | MOYENNE5.3 | An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel. | 19/06/2020 |