CVE-2023-35075: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

November 27, 2023 (updated November 28, 2023)

Mattermost fails to use innerText / textContent when setting the channel name in the webapp during autocomplete, allowing an attacker to inject HTML to a victim’s page by create a channel name that is valid HTML. No XSS is possible though.

References

github.com/advisories/GHSA-jcgv-3pfq-j4hr
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2023-35075

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