Is CVE-2026-13440 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13440 being exploited in the wild.

How severe is CVE-2026-13440?

High severity, with a CVSS score of 7.2, published 28 July 2026.

Is there a fix for CVE-2026-13440?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-13440 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-13440?

Check whether you run weDevs StoreGrowth at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-13440: wedevs StoreGrowth Stored XSS via message_popup parameter

CVE-2026-13440 · Severity: high · CVSS 7.2 · Published 2026-07-28

StoreGrowth, a WordPress plugin used to enhance WooCommerce sales through features like popups and upsells, contains a security flaw that allows unauthorized individuals to inject malicious scripts into the website. This occurs because the plugin fails to properly clean user-provided data and inadvertently shares a security token (nonce) with all visitors. An attacker could use this to redirect customers to fraudulent sites, steal session information, or deface the store, potentially damaging the business's reputation and customer trust.

Technologies: weDevs StoreGrowth. Vendors: weDevs.

Quick answers

Is CVE-2026-13440 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13440 being exploited in the wild.
How severe is CVE-2026-13440?: High severity, with a CVSS score of 7.2, published 28 July 2026.
Which products and versions are affected?: weDevs StoreGrowth <= 2.1.0.
Is there a fix for CVE-2026-13440?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-13440 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-13440?: Check whether you run weDevs StoreGrowth at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The StoreGrowth plugin for WordPress (versions up to 2.1.0) is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'message_popup' parameter. While the 'create_popup' handler is protected by an 'ajd_protected' nonce, this nonce is improperly exposed to all unauthenticated frontend visitors via 'wp_localize_script' under 'bogo_save_url.ajd_nonce'. This exposure allows unauthenticated attackers to bypass intended access controls and submit malicious payloads. When a user or administrator views the affected page, the injected script executes in their browser context. A patch appears to be available in versions following 2.1.0.

Affected products

wedevs StoreGrowth – Upsell, BOGO, Quick View, Direct Checkout & Side Cart for WooCommerce <= 2.1.0

Timeline

2026-07-28: disclosed
2026-07-28: advisory

References

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