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Cross-site Scripting in Mattermost

Moderate severity GitHub Reviewed Published Sep 23, 2021 to the GitHub Advisory Database • Updated Apr 3, 2023

Package

gomod github.com/mattermost/mattermost-server/v5 (Go)

Affected versions

< 5.39.0

Patched versions

5.39.0

Description

Mattermost 5.38 and earlier fails to sufficiently sanitize clipboard contents, which allows a user-assisted attacker to inject arbitrary web script in product deployments that explicitly disable the default CSP.

References

Published by the National Vulnerability Database Sep 22, 2021
Reviewed Sep 23, 2021
Published to the GitHub Advisory Database Sep 23, 2021
Last updated Apr 3, 2023

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2021-37860

GHSA ID

GHSA-hv5f-73mr-7vvj

Source code

Credits

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