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Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability

Moderate severity GitHub Reviewed Published Nov 27, 2023 to the GitHub Advisory Database • Updated Nov 28, 2023

Package

gomod github.com/mattermost/mattermost-server/v6 (Go)

Affected versions

< 7.8.13

Patched versions

7.8.13
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.1.4
8.1.4

Description

Mattermost fails to properly validate the "Show Full Name" option in a few endpoints in Mattermost Boards, allowing a member to get the full name of another user even if the Show Full Name option was disabled. 

References

Published by the National Vulnerability Database Nov 27, 2023
Published to the GitHub Advisory Database Nov 27, 2023
Last updated Nov 28, 2023
Reviewed Nov 28, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(50th percentile)

Weaknesses

Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Learn more on MITRE.

CVE ID

CVE-2023-45223

GHSA ID

GHSA-p5pr-vm3j-jxxf

Source code

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