CVE-2026-16538

TeraWallet - Wallet for WooCommerce <= 1.6.9 - Missing Authorization to Authenticated (Subscriber+) Wallet Balance Inflation

2026-08-10 00:00
Guillermo Álvarez Fernández

Strategic Overview

Status
Patched in 1.6.10
Affected Plugin
Wallet for WooCommerce
Affected Version
<= 1.6.9
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-16538
View all Wallet for WooCommerce vulnerabilities

At a glance

CVE-2026-16538 is a medium-severity Missing Authorization vulnerability in the Wallet for WooCommerce WordPress plugin, affecting versions <= 1.6.9. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 1.6.10; sites on affected versions should update now. Disclosed August 2026, reported by Guillermo Álvarez Fernández.

Vulnerability Overview

The TeraWallet - Wallet for WooCommerce plugin for WordPress is vulnerable to unauthorized access in versions up to, and including, 1.6.9. This is due to use of order subtotal instead of the post-discount line item total when calculating the wallet credit amount for top-up purchases. This makes it possible for authenticated attackers, with subscriber-level access and above, to inflate their wallet balance beyond the amount paid by applying store coupons to wallet top-up purchases, as the credited amount was based on the pre-discount subtotal rather than the actual amount collected.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Wallet for WooCommerce <= 1.6.9 takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Wallet for WooCommerce the fix is 1.6.10: builds <= 1.6.9 are affected, anything from 1.6.10 onward is not.

Remediation

Update to version 1.6.10, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Wallet for WooCommerce 1.6.10 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-16538https://www.wordfence.com/threat-intel/vulnerabilities/id/7b899c03-e5f0-485d-accf-15acfd4e1b0chttps://nvd.nist.gov/vuln/detail/CVE-2026-16538

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C