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.

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.

Affected products

Unknown Filter Gallery

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

contact@wpscan.com (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.