What is CVE-2026-90978?

CVE-2026-90978 is a high-severity vulnerability in Filter Gallery, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-09-18.

How severe is CVE-2026-90978?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Filter Gallery

CVE-2026-90978

The Filter Gallery WordPress plugin before 1.1.5 does not verify the nonce on several of its AJAX handlers when the nonce field is omitted, and applies no capability check, allowing low-privileged users to overwrite the content of arbitrary posts and delete the Filter Gallery WordPress plugin before 1.1.5's stored gallery options.

Published 2026-09-18 · last modified 2026-09-18.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L.

EPSS exploit prediction

EPSS: 0.003 (27.3th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.3% 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

Filter Gallery

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

wpscan.com/vulnerability/39321ecd-98e5-4f4e-9a42-bedf5904c3d1/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-90978?: CVE-2026-90978 is a high-severity vulnerability in Filter Gallery, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-09-18.
How severe is CVE-2026-90978?: High severity. CVSS v3 base score is 7.1 out of 10.