What is CVE-2026-83555?

CVE-2026-83555 is a medium-severity vulnerability in Email Subscribers & Newsletters, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-23.

How severe is CVE-2026-83555?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Email Subscribers & Newsletters

CVE-2026-83555

The Email Subscribers & Newsletters WordPress plugin before 5.9.35 does not verify the per-subscriber management token before changing a subscriber's subscription status, allowing unauthenticated users to force-unsubscribe or force-confirm an arbitrary subscriber whose email address they know.

Vulnerability class: Broken Access Control

Published 2026-09-23 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (8.5th percentile), scored 2026-09-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Email Subscribers & Newsletters

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

wpscan.com/vulnerability/54cb2a98-7860-40dd-817e-1294317084aa/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-83555?: CVE-2026-83555 is a medium-severity vulnerability in Email Subscribers & Newsletters, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-23.
How severe is CVE-2026-83555?: Medium severity. CVSS v3 base score is 5.3 out of 10.