Checkout Upsell And Order Bumps Vulnerabilities

The UpsellWP plugin for WordPress is vulnerable to Payment Bypass in all versions up to, and including, 2.2.9. This is due to a lack of server-side payment verification. This makes it possible for unauthenticated attackers to bypass payments.

CVSS:

5.3

(Wordfence)

Affected:

up to 2.2.9

Fixed in:

2.2.10

Disclosed:

Sep 16, 2026

CVE-2026-85350 on NVD →

SQL Injection vulnerability

CVSS:

7.6

(Patchstack)

Affected:

up to 2.2.4

Fixed in:

2.2.5

Disclosed:

Mar 14, 2026

The UpsellWP – WooCommerce Upsell and Related Products Offers plugin for WordPress is vulnerable to SQL Injection in versions up to, and including, 2.2.4 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated att...

CVSS:

4.9

(Wordfence)

Affected:

up to 2.2.4

Fixed in:

2.2.5

Disclosed:

Mar 14, 2026

CVE-2026-32459 on NVD →

The UpsellWP plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in versions up to, and including, 2.2.5. This makes it possible for authenticated attackers, with subscriber-level access and above, to perform an unauthorized action.

CVSS:

4.3

(Wordfence)

Affected:

up to 2.2.5

Fixed in:

2.2.6

Disclosed:

Jan 28, 2026

CVE-2026-25419 on NVD →