What is CVE-2026-16990?

CVE-2026-16990 is a medium-severity vulnerability in Payment Button For Paypal, classified under CWE-602 CLIENT-SIDE ENFORCEMENT OF SERVER-SIDE SECURITY. CVSS score: 5.3/10. Published 2026-08-12.

How severe is CVE-2026-16990?

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

Vulnerability in Payment Button For Paypal

CVE-2026-16990

The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order agains…

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.

Affected products

Unknown Payment Button For Paypal — versions 0

References

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

Frequently asked questions

What is CVE-2026-16990?: CVE-2026-16990 is a medium-severity vulnerability in Payment Button For Paypal, classified under CWE-602 CLIENT-SIDE ENFORCEMENT OF SERVER-SIDE SECURITY. CVSS score: 5.3/10. Published 2026-08-12.
How severe is CVE-2026-16990?: Medium severity. CVSS v3 base score is 5.3 out of 10.