UpHeron
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Servers and applications

CVE-2021-37860

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.

Severity
Medium 6.1
Published
22 Sept 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost
  • Every version up to 5.38

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-37860
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-37860