What is the CVSS score of CVE-2026-13440?

CVE-2026-13440 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.3%.

Storegrowth Upsell Bogo Quick View Direct Checkout Side Cart For Woocommerce CVE-2026-13440

EUVD-2026-49761 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-07-28 Wordfence

GHSA-qmvq-mp3j-6pvv

XSS WordPress Storegrowth Upsell Bogo Quick View Direct Checkout Side Cart For Woocommerce

7.2

CVSS 3.1 · Vendor: Wordfence

Severity by source

Vendor (Wordfence) PRIMARY

7.2 HIGH

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Primary rating from Vendor (Wordfence) · only source for this CVE.

CVSS VectorVendor: Wordfence

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Jul 28, 2026 - 12:16 vuln.today

CVE Published

Jul 28, 2026 - 11:32 cve.org

HIGH 7.2

DescriptionCVE.org

The StoreGrowth: Smart Sales Booster for WooCommerce | BOGO, Upsells, Direct Checkout, Quick View, Side Cart plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'message_popup' parameter in all versions up to, and including, 2.1.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit is possible because the 'ajd_protected' nonce required by the create_popup handler is exposed to all unauthenticated frontend visitors via wp_localize_script under bogo_save_url.ajd_nonce, effectively bypassing the nonce-only access control.

Articles & Coverage 1

News 19 New WordPress Vulnerabilities - 2 Critical, 17 High Jul 29, 2026

AnalysisAI

Stored cross-site scripting in StoreGrowth Sales Booster for WooCommerce allows unauthenticated attackers to inject web scripts via the 'message_popup' AJAX parameter. The vulnerability arises because the required nonce is exposed to all frontend visitors, completely bypassing the intended access control. …