CVE-2019-20878
MEDIUMCVSS 4.3/10EPSS 0.74%
Last modified
CVE-2019-20878 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. Changes, within the application, to e-mail addresses are mishandled.. EPSS estimates a 0.74% chance of exploitation in the next 30 days.
Description
An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. Changes, within the application, to e-mail addresses are mishandled.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Mattermost | Mattermost Server | < 4.10.8 | — |
| Mattermost | Mattermost Server | >= 5.7.0, < 5.7.3 | — |
| Mattermost | Mattermost Server | >= 5.8.0, < 5.8.1 | — |
| Mattermost | Mattermost Server | 5.9.0 | Rc1 |
References
- https://mattermost.com/security-updates/Vendor Advisory
- https://mattermost.com/security-updates/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-20878?
An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. Changes, within the application, to e-mail addresses are mishandled.
How severe is CVE-2019-20878?
CVE-2019-20878 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.
How do I fix CVE-2019-20878?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2019-20878?
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