What is CVE-2026-89331?

CVE-2026-89331 is a medium-severity vulnerability in Fluentboards, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-09-23.

How severe is CVE-2026-89331?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Fluentboards

CVE-2026-89331

The FluentBoards WordPress plugin before 2.1.0 does not properly restrict the member data returned by its public, token-shared board feature, allowing unauthenticated users to disclose the email addresses of a shared board's members, typically including administrators.

Vulnerability class: Information Disclosure

Published 2026-09-23 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.0th percentile), scored 2026-09-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Fluentboards

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

wpscan.com/vulnerability/d1aaacdf-7427-411f-b376-999793524a4b/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-89331?: CVE-2026-89331 is a medium-severity vulnerability in Fluentboards, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-09-23.
How severe is CVE-2026-89331?: Medium severity. CVSS v3 base score is 5.3 out of 10.