What is CVE-2026-89327?

CVE-2026-89327 is a low-severity vulnerability in Fluentboards, classified under Authentication Bypass by Spoofing. CVSS score: 3.8/10. Published 2026-09-16.

How severe is CVE-2026-89327?

Low severity. CVSS v3 base score is 3.8 out of 10.

Vulnerability in Fluentboards

CVE-2026-89327

The FluentBoards WordPress plugin before 2.0.15 does not verify that a board member submitting a comment is the user the comment is attributed to, allowing any board member to post comments that appear to be authored by another user, including administrators.

Published 2026-09-16 · last modified 2026-09-17.

CVSS v3 metric

CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.1th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Fluentboards

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

wpscan.com/vulnerability/aaeff6e8-eca5-4d93-8214-670f1728fb0e/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-89327?: CVE-2026-89327 is a low-severity vulnerability in Fluentboards, classified under Authentication Bypass by Spoofing. CVSS score: 3.8/10. Published 2026-09-16.
How severe is CVE-2026-89327?: Low severity. CVSS v3 base score is 3.8 out of 10.