CVE-2017-18877 : An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS attacks could occur against an OAuth 2.

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS attacks could occur against an OAuth 2.0 allow/deny page.

Published 2020-06-19 17:15:12

Updated 2020-06-24 20:06:39

Source MITRE

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Exploit prediction scoring system (EPSS) score for CVE-2017-18877

EPSS FAQ

0.08%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 33 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-18877

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2017-18877

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Assigned by: nvd@nist.gov (Primary)

Products affected by CVE-2017-18877

Mattermost » Mattermost Server
Versions from including (>=) 4.1.0 and before (<) 4.1.2
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Matching versions
Mattermost » Mattermost Server
Versions from including (>=) 4.2.0 and before (<) 4.2.1
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Matching versions
Mattermost » Mattermost Server » Version: 4.3.0 Update RC1
cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc1:*:*:*:*:*:*
Matching versions
Mattermost » Mattermost Server » Version: 4.3.0 Update RC2
cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc2:*:*:*:*:*:*
Matching versions
Mattermost » Mattermost Server » Version: 4.3.0 Update RC3
cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc3:*:*:*:*:*:*
Matching versions
Mattermost » Mattermost Server » Version: 4.3.0 Update RC4
cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc4:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2017-18877

Exploit prediction scoring system (EPSS) score for CVE-2017-18877

CVSS scores for CVE-2017-18877

CWE ids for CVE-2017-18877

References for CVE-2017-18877

Products affected by CVE-2017-18877