External risk intelligence

Product Slider Pro for WooCommerce Vulnerability Allows Malicious Software Implant

CVE advisorySeverity: CRITICAL (CVSS 10.0)

CVE-2026-49777

This vulnerability affects a WooCommerce plugin designed to display products on a website. Since such plugins are typically integrated into public-facing web storefronts to provide content to site visitors, the vulnerable code is commonly exposed to the internet as part of the public web application surface.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in a widely used e-commerce plugin, potentially allowing malicious software to be implanted. This issue impacts the Product Slider Pro for WooCommerce plugin, meaning any business utilizing this specific tool on their website could be at risk. The core problem lies in how the plugin handles certain inputs, creating an opening for unauthorized code execution.

Plugin flaw could allow malicious code insertion.
Affects e-commerce sites using Product Slider Pro.
Confirm relevance and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending specially crafted data to a website using the Product Slider Pro for WooCommerce plugin. This could allow them to implant malicious software, potentially leading to significant compromise of the website and its data.

Attacker can reach the vulnerable component remotely.
Malicious input triggers the improper validation.
Allows for implantation of malicious software.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow malicious software to be implanted within the Product Slider Pro for WooCommerce plugin, potentially affecting the integrity and availability of the e-commerce platform. This exposure might occur when the plugin is actively processing user-provided input, which, when improperly validated, could lead to unauthorized code execution.

Plugin integrity and service availability.
Malicious code injection via input validation.
Compromised website functionality and data.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical vulnerability in Product Slider Pro for WooCommerce likely resides within the e-commerce platform infrastructure. The first practical step is for the platform or e-commerce team to identify all instances of this plugin, determine its exposure, and confirm the accountable owner for remediation.

Platform/e-commerce team owns remediation.
Verify plugin installation and internet reachability.
Plan vendor coordination or upgrade.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Product Slider Pro for WooCommerce?

It is a WordPress plugin used by online stores to create interactive, visual galleries for products. It simplifies how customers browse items on a website. Because it integrates directly into the storefront to display content to visitors, it is a functional component of the e-commerce user experience.

What does CWE-1284 mean for CVE-2026-49777?

This vulnerability is classified as Improper Validation of Specified Quantity in Input. In plain terms, the plugin fails to properly check numerical or quantity-based data sent to it. This oversight allows an attacker to bypass standard security checks and insert unauthorized, malicious code into the website.

How does an attacker trigger this vulnerability?

An attacker exploits this by sending specially crafted data to the website that the plugin processes. It is important to note that this bug is not triggered by normal visitor actions like simply browsing products. It requires the submission of specific, malformed input designed to take advantage of the plugin's flawed validation logic.

Is my website at risk if I use this plugin?

According to Halo Surface Signal, this plugin is typically part of a public-facing web storefront, meaning it is often exposed to the internet. If your site uses an affected version, the vulnerable code is likely reachable by anyone online, making it a critical concern for site integrity and data security.

What should I do first to address this?

Start by identifying every website where this plugin is installed. Once you have a list, verify if your current version is earlier than 3.5.4, which is when this issue was addressed. Coordinate with your team to plan for an immediate update to a secure version to prevent potential unauthorized access to your e-commerce platform.

References

patchstack.com/database/wordpress/plugin/woo-product-slider-pro/vuln…

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.