CVE-2023-35075

HTML injection via channel autocomplete

State: Published
Severity: 3.1 Low
Published: Nov 27, 2023
Updated: Jun 3, 2025
Reserved: Nov 20, 2023

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N	Mattermost

Weaknesses

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Affected Products

Product	Versions
MattermostMattermost	8.1.3 and earlierAffected 7.8.12 and earlierAffected 7.8.13Not affected 8.1.4Not affected

References

https://mattermost.com/security-updates

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