CVE-2019-20887
MEDIUMCVSS 4.3/10EPSS 0.65%
Last modified
CVE-2019-20887 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Server | < 4.10.6 |
| Mattermost | Mattermost Server | >= 5.5.0, < 5.5.3 |
| Mattermost | Mattermost Server | >= 5.6.0, < 5.6.4 |
| Mattermost | Mattermost Server | >= 5.7.0, < 5.7.1 |
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-2019-20887?
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.
How severe is CVE-2019-20887?
CVE-2019-20887 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.
How do I fix CVE-2019-20887?
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.
Are you affected by CVE-2019-20887?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST