VulnerabilityModified
CVE-2019-20884
It allows attackers to partially attach a file to more than one post.
MEDIUM 5.3EPSS 0.81%
Does this matter?
Lower severity and a low EPSS score (0.81%). Track it; it rarely justifies an emergency change on its own.
Description
An issue was discovered in Mattermost Server before 5.8.0. It allows attackers to partially attach a file to more than one post.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.81% probability · 57th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- mattermost/mattermost server
- Source
- cve@mitre.org
EPSS 0.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://mattermost.com/security-updates/Vendor Advisory
- https://mattermost.com/security-updates/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.