What is CVE-2026-88828?

CVE-2026-88828 is a medium-severity vulnerability in Blacklist Manager, classified under CWE-288 AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL. CVSS score: 5.4/10. Published 2026-09-28.

How severe is CVE-2026-88828?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Blacklist Manager

CVE-2026-88828

The Blacklist Manager for WooCommerce WordPress plugin from 1.3.0 to 2.3.1 does not enforce its user blocking on every authentication path, allowing the holder of an account the site owner has blocked to keep authenticating with that account's privileges, without the block being enforced or recorded.

Published 2026-09-28.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Blacklist Manager

References

wpscan.com/vulnerability/52804421-8988-4d8a-9143-04683d05873d/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-88828?: CVE-2026-88828 is a medium-severity vulnerability in Blacklist Manager, classified under CWE-288 AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL. CVSS score: 5.4/10. Published 2026-09-28.
How severe is CVE-2026-88828?: Medium severity. CVSS v3 base score is 5.4 out of 10.