Auth bypass in Wp Post Author

CVE-2026-108685

The WP Post Author WordPress plugin before 4.2.0 does not check that the account was created before updating its profile during front-end registration, allowing unauthenticated users to overwrite the display name, nickname and website of the first user account, which is normally the administrator, when a registration form declares one of those fields.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.6% 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

  • Wp Post Author

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-108685?
CVE-2026-108685 is a low-severity vulnerability in Wp Post Author, classified under Missing Authorization. CVSS score: 3.7/10. Published 2026-10-29.
How severe is CVE-2026-108685?
Low severity. CVSS v3 base score is 3.7 out of 10.