What’s Vulnerable › Vulnerabilities
CVE-2023-2787: Collapsed Reply Threads APIs leak message contents from private channels
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-06-16 · updated 2026-06-17
- Weakness: CWE-862
Description
Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.
Affected products
- Mattermost App Framework: from 7.1.0 through 7.1.9; from 7.8.0 through 7.8.4; from 7.9.0 through 7.9.3; 7.10.0
References
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