CVE-2019-20858

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Jun 19, 2020
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2019

CVE-2019-208597.5An issue was discovered in Mattermost Server before 5.15.0. Login access control can be bypassed via crafted input.CVE-2019-20868.8In libxaac, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no additionCVE-2019-208605.5An 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 serviCVE-2019-208618.8An issue was discovered in Mattermost Desktop App before 4.2.2. It allows attackers to execute arbitrary code via a crafted link.CVE-2019-208627.5An issue was discovered in Mattermost Server before 5.13.0. Non-members may fetch a team's slash commands.CVE-2019-208637.5An issue was discovered in Mattermost Server before 5.13.0. Incoming webhook creation is not properly restricted.CVE-2019-208647.5An issue was discovered in Mattermost Plugins before 5.13.0. The GitHub plugin allows an attacker to attach his Mattermost account to a diffCVE-2019-208658.8An 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.CVE-2019-208665.3An 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 headeCVE-2019-208675.3An issue was discovered in Mattermost Server before 5.11.0. An attacker can interfere with a channel's post loading via one crafted post.CVE-2019-208687.5An issue was discovered in Mattermost Server before 5.11.0. Invite IDs were improperly generated.CVE-2019-208695.3An issue was discovered in Mattermost Server before 5.10.0, 5.9.1, 5.8.2, and 4.10.9. A non-member could change the Update/Patch Channel end
CVE-2019-20858: High severity, CVSS 7.5 | Vulnix