Monthly Archive: June 2020

CVE-2018-21254

An issue was discovered in Mattermost Server before 5.1. An attacker can bypass intended access control (for direct-message channel creation) via the Message slash command. Date published : 2020-06-19 https://mattermost.com/security-updates/

CVE-2018-21253

An issue was discovered in Mattermost Server before 5.1, 5.0.2, and 4.10.2. An attacker could use the invite_people slash command to invite a non-permitted user. Date published : 2020-06-19 https://mattermost.com/security-updates/

CVE-2018-21252

An issue was discovered in Mattermost Server before 5.2, 5.1.1, 5.0.3, and 4.10.3. Attackers could use multiple e-mail addresses to bypass a domain-based policy for signups. Date published : 2020-06-19 https://mattermost.com/security-updates/

CVE-2018-21251

An issue was discovered in Mattermost Server before 5.2 and 5.1.1. Authorization could be bypassed if the channel name were not the same in the params and the body. Date published : 2020-06-19 https://mattermost.com/security-updates/

CVE-2018-21250

An issue was discovered in Mattermost Server before 5.2.2, 5.1.2, and 4.10.4. It allows remote attackers to cause a denial of service (memory consumption) via crafted image dimensions. Date published : 2020-06-19 https://mattermost.com/security-updates/

CVE-2019-20888

An issue was discovered in Mattermost Server before 5.7, 5.6.3, 5.5.2, and 4.10.5. It allows attackers to cause a denial of service (memory consumption) via an outgoing webhook or a slash command integration. Date...

CVE-2019-20887

An issue was discovered in Mattermost Server before 5.7.1, 5.6.4, 5.5.3, and 4.10.6. It does not honor flags API permissions when deciding whether a user can receive intra-team posts. Date published : 2020-06-19 https://mattermost.com/security-updates/