CVE-2021-37860: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

September 23, 2021 (updated October 6, 2021)

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

github.com/advisories/GHSA-hv5f-73mr-7vvj
nvd.nist.gov/vuln/detail/CVE-2021-37860

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