Mattermost Focalboard up to 8.0 Category Reorder API sql injection

Summaryinfo

A vulnerability was found in Mattermost Focalboard up to 8.0. It has been classified as critical. Affected is an unknown function of the component Category Reorder API. Performing a manipulation results in sql injection. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is identified as CVE-2026-25773. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Mattermost Focalboard up to 8.0. It has been classified as critical. This affects an unknown code block of the component Category Reorder API. The manipulation with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

** 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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-25773 since 04/03/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/03/2026). MITRE ATT&CK project uses the attack technique T1505 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Groupware Software

Vendor

• Mattermost

Name

• Focalboard

Version

• 8.0

License

• open-source

Support

• end of life

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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