High severity · published Jun 19, 2020
CVE-2019-20855
An issue was discovered in Mattermost Server before 5.16.1, 5.15.2, 5.14.5, and 5.9.6
7.5
CVSS
1.2%
EPSS
No
On KEV
Description
An issue was discovered in Mattermost Server before 5.16.1, 5.15.2, 5.14.5, and 5.9.6. It allows attackers to obtain sensitive information (local files) during legacy attachment migration.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
Mattermost Server · Mattermost
before 5.9.6; 5.14.0 before 5.14.5; 5.15.0 before 5.15.2; 5.16.0 before 5.16.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20855
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20855
Vendor Advisory
https://mattermost.com/security-updates/
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