Vulnerability in Conekta Payment Gateway

CVE-2026-16738

The Conekta Payment Gateway WordPress plugin before 6.2.2 does not verify the authenticity of incoming payment gateway webhook notifications, nor bind the confirmed payment to the targeted order or verify its amount, allowing unauthenticated attackers to mark arbitrary orders as paid without payment.

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 (23.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.9% 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-2026-16738: held from 0.002 to 0.003.

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

Affected products

  • Conekta Payment Gateway

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16738?
CVE-2026-16738 is a medium-severity vulnerability in Conekta Payment Gateway, classified under Improper Access Control. CVSS score: 5.3/10. Published 2026-08-22.
How severe is CVE-2026-16738?
Medium severity. CVSS v3 base score is 5.3 out of 10.