What is CVE-2026-8678?

CVE-2026-8678 is a medium-severity vulnerability in Richardperdaan Myparcel, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-07-11.

How severe is CVE-2026-8678?

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

Auth bypass in Richardperdaan Myparcel

CVE-2026-8678

The MyParcel plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.25.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to view and modify shipment options — including carrier, delivery type, package type, number of labels, weight, signature requirement, and insurance — on any arbitrary order.

Vulnerability class: Broken Access Control

Published 2026-07-11 · last modified 2026-07-13.

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.

EPSS exploit prediction

EPSS: 0.004 (32.6th percentile), scored 2026-10-12.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Richardperdaan Myparcel — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2026-8678?: CVE-2026-8678 is a medium-severity vulnerability in Richardperdaan Myparcel, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-07-11.
How severe is CVE-2026-8678?: Medium severity. CVSS v3 base score is 4.3 out of 10.