What’s Vulnerable › Vulnerabilities
CVE-2023-4105: Attachment of deleted message in a thread remains accessible and downloadable
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-08-11 · updated 2026-06-17
- Weakness: CWE-862
Description
Mattermost fails to delete the attachments when deleting a message in a thread allowing a simple user to still be able to access and download the attachment of a deleted message
Affected products
- Mattermost App Framework: from 7.8.0 before 7.8.8; from 7.9.0 before 7.9.6; from 7.10.0 before 7.10.4 — fixed in 7.10.4, 7.8.8, 7.9.6
How to fix
Upgrade to a fixed version: Mattermost App Framework 7.10.4, 7.8.8, 7.9.6. Check the vendor advisory for mitigations.
References
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