EPSS
Percentile
25.9%
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.
docs.mattermost.com/install/self-managed-changelog.html#release-v5-39-quality-release
github.com/mattermost/mattermost-server
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2021-37860