SQL Injection in Mattermost Focalboard
CVE-2026-25773
** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to sanitize category IDs before incorporating them into dynamic SQL statements when reordering categories. An attacker can inject a malicious SQL payload into the category id field, which is stored in the database and later executed unsanitized when the category reorder API processes the stored value. This Second-Order SQL Injection (Time-Based Blind) allows an authenticated attacker to exfiltrate sensitive data including password hashes of other users. NOTE: Focalboard as a standalone product is not maintained and no fix will be issued.
Vulnerability class: SQL Injection
EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Mattermost Focalboard — versions 8.0.0, 0
Weakness classification (CWE)
References
- responsibledisclosure@mattermost.com (Product)
Frequently asked questions
- What is CVE-2026-25773?
- CVE-2026-25773 is a high-severity vulnerability in Mattermost Focalboard, classified under SQL Injection. CVSS score: 8.1/10. Published 2026-04-03.
- How severe is CVE-2026-25773?
- High severity. CVSS v3 base score is 8.1 out of 10.