What is CVE-2026-78139?

CVE-2026-78139 is a medium-severity vulnerability in Notifima, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-08-27.

How severe is CVE-2026-78139?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Notifima

CVE-2026-78139

The Notifima WordPress plugin before 3.1.4 does not verify that the caller owns the subscription being modified on one of its REST endpoints in all versions up to, and including, 3.1.3, allowing authenticated attackers with Subscriber-level access to unsubscribe arbitrary customers from product stock-alert notifications.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.001 (3.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Unknown Notifima

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-78139?: CVE-2026-78139 is a medium-severity vulnerability in Notifima, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-08-27.
How severe is CVE-2026-78139?: Medium severity. CVSS v3 base score is 4.3 out of 10.