What is CVE-2026-18031?

CVE-2026-18031 is a critical-severity vulnerability in Tabapay Gateway, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-08-19.

How severe is CVE-2026-18031?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Tabapay Gateway

CVE-2026-18031

The TabaPay Gateway WordPress plugin through 1.4.0 does not validate the payment callback before establishing a session for the account associated with the referenced order, allowing unauthenticated attackers to log in as any registered user, including an administrator.

Vulnerability class: Broken Authentication

Published 2026-08-19 · last modified 2026-08-26.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.5th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Tabapay Gateway

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

wpscan.com/vulnerability/6576dcd1-aea6-47c0-9157-4ca56f426612/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-18031?: CVE-2026-18031 is a critical-severity vulnerability in Tabapay Gateway, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-08-19.
How severe is CVE-2026-18031?: Critical severity. CVSS v3 base score is 9.8 out of 10.