What’s Vulnerable › Vulnerabilities

CVE-2023-3590: Deleted attachments in Boards remain accessible

• Severity: high (CVSS 7.5 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: 2023-07-17 · updated 2026-06-17
• Weakness: CWE-863

Description

Mattermost fails to delete card attachments in Boards, allowing an attacker to access deleted attachments.

Affected products

• Mattermost: from 7.10.0 before 7.10.3 — fixed in 7.10.3

How to fix

Upgrade to a fixed version: Mattermost 7.10.3. Check the vendor advisory for mitigations.

References

• https://mattermost.com/security-updates
• https://mattermost.com/security-updates

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