How severe is CVE-2026-25773?

CVE-2026-25773 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-25773 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25773?

CVE-2026-25773 affects Mattermost Focalboard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25773?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25773 have an EU (EUVD) identifier?

Yes. CVE-2026-25773 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18651.

When was CVE-2026-25773 published?

CVE-2026-25773 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-25773

CVE-2026-25773 is a high-severity vulnerability in Mattermost Focalboard with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18651
Weakness: CWE-89
Affected product: Mattermost Focalboard
Published: 2026-04-03
Last modified: 2026-06-17

Description

** 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.

Frequently asked questions

What is 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.
How severe is CVE-2026-25773?: CVE-2026-25773 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-25773 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25773?: CVE-2026-25773 affects Mattermost Focalboard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25773?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25773 have an EU (EUVD) identifier?: Yes. CVE-2026-25773 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18651.
When was CVE-2026-25773 published?: CVE-2026-25773 was published on 2026-04-03 and last updated on 2026-06-17.

References

https://github.com/mattermost-community/focalboard

Affected products (1)

cpe:2.3:a:mattermost:focalboard:8.0.0:*:*:*:*:*:*:*

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