Auth bypass in Wpforms

CVE-2026-4986

The WPForms WordPress plugin before 1.10.0.5 does not verify the authenticity of incoming PayPal webhook events before processing them, allowing unauthenticated attackers to forge webhook payloads and manipulate the payment state of arbitrary transactions.

Vulnerability class: Broken Access Control

Published · last modified .

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: 0.003 (23.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-4986: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Wpforms — versions 1.10.0.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4986?
CVE-2026-4986 is a medium-severity vulnerability in Wpforms, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-06-09.
How severe is CVE-2026-4986?
Medium severity. CVSS v3 base score is 5.3 out of 10.