What’s Vulnerable › Vulnerabilities
CVE-2018-21261
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-06-19 · updated 2026-06-17
- Weakness: CWE-732
Description
An issue was discovered in Mattermost Server before 4.8.1, 4.7.4, and 4.6.3. An e-mail invite accidentally included the team invite_id, which leads to unintended excessive invitation privileges.
Affected products
- Mattermost: from 4.6.0 before 4.6.3; from 4.7.0 before 4.7.4; from 4.8.0 before 4.8.1 — fixed in 4.6.3, 4.7.4, 4.8.1
How to fix
Upgrade to a fixed version: Mattermost 4.6.3, 4.7.4, 4.8.1. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2018-21261 or the next vulnerability affects your stack