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4 vulnerabilities found for Focalboard by Mattermost

CVE-2026-28736 (GCVE-0-2026-28736)

Vulnerability from nvd – Published: 2026-04-03 13:25 – Updated: 2026-04-03 14:54 Unsupported When Assigned
VLAI?
Title
Focalboard IDOR in file content endpoint allows cross-user file access (unsupported product, no fix)
Summary
** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files. This allows an authenticated attacker who knows a victim's fileID to read the content of the file. NOTE: Focalboard as a standalone product is not maintained and no fix will be issued.
Severity ?
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Mattermost Focalboard Affected: 0 , ≤ 8.0 (semver)
Create a notification for this product.
Credits
Siam Thanat Hack Company Limited
Show details on NVD website
To clipboard 

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CVE-2026-25773 (GCVE-0-2026-25773)

Vulnerability from nvd – Published: 2026-04-03 13:24 – Updated: 2026-04-03 14:57 Unsupported When Assigned
VLAI?
Title
Focalboard Second-Order SQL Injection in category reorder endpoint allows data exfiltration (unsupported product, no fix)
Summary
** 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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
Impacted products
Vendor Product Version
Mattermost Focalboard Affected: 0 , ≤ 8.0 (semver)
Create a notification for this product.
Credits
Siam Thanat Hack Company Limited (pentest@sth.sh)
Show details on NVD website
To clipboard 

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CVE-2026-28736 (GCVE-0-2026-28736)

Vulnerability from cvelistv5 – Published: 2026-04-03 13:25 – Updated: 2026-04-03 14:54 Unsupported When Assigned
VLAI?
Title
Focalboard IDOR in file content endpoint allows cross-user file access (unsupported product, no fix)
Summary
** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files. This allows an authenticated attacker who knows a victim's fileID to read the content of the file. NOTE: Focalboard as a standalone product is not maintained and no fix will be issued.
Severity ?
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Mattermost Focalboard Affected: 0 , ≤ 8.0 (semver)
Create a notification for this product.
Credits
Siam Thanat Hack Company Limited
Show details on NVD website
To clipboard 

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CVE-2026-25773 (GCVE-0-2026-25773)

Vulnerability from cvelistv5 – Published: 2026-04-03 13:24 – Updated: 2026-04-03 14:57 Unsupported When Assigned
VLAI?
Title
Focalboard Second-Order SQL Injection in category reorder endpoint allows data exfiltration (unsupported product, no fix)
Summary
** 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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
Impacted products
Vendor Product Version
Mattermost Focalboard Affected: 0 , ≤ 8.0 (semver)
Create a notification for this product.
Credits
Siam Thanat Hack Company Limited (pentest@sth.sh)
Show details on NVD website
To clipboard 

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