CVE-2026-49777 Overview
CVE-2026-49777 is a maximum-severity vulnerability affecting the ShapedPlugin, LLC Product Slider Pro for WooCommerce plugin for WordPress. The flaw stems from improper validation of specified quantity in input [CWE-1284], which permits malicious software to be implanted into affected installations. All plugin versions prior to 3.5.4 are vulnerable. The issue is network-exploitable, requires no authentication, and needs no user interaction, giving remote attackers full control over the WordPress site and its underlying e-commerce environment.
Critical Impact
Unauthenticated remote attackers can implant malicious code into vulnerable WooCommerce stores, leading to full site compromise, customer data theft, and persistent backdoor access.
Affected Products
- ShapedPlugin, LLC Product Slider Pro for WooCommerce versions before 3.5.4
- WordPress sites running WooCommerce with the affected plugin installed
- E-commerce environments that rely on the plugin for product display functionality
Discovery Timeline
- 2026-06-05 - CVE-2026-49777 published to the National Vulnerability Database
- 2026-06-08 - Last updated in NVD database
Technical Details for CVE-2026-49777
Vulnerability Analysis
The vulnerability is classified under [CWE-1284] (Improper Validation of Specified Quantity in Input). The plugin fails to validate the size, length, or count of input data before processing it, which allows an attacker to deliver content the application was not designed to safely handle. In this case, the weakness functions as a backdoor: an unauthenticated remote actor can submit crafted input that results in malicious software being implanted on the host.
Because the plugin executes within the WordPress request lifecycle, implanted code runs with the privileges of the PHP worker process. This typically grants read and write access to the WordPress database, the plugin and theme directories, and uploaded media. Attackers can persist webshells, modify checkout logic to skim payment data, or pivot to other tenants on shared hosting.
The Patchstack advisory tracks this issue as a backdoor vulnerability affecting versions through 3.5.2, with the fix shipped in 3.5.4. See the Patchstack Vulnerability Report for vendor-specific technical details.
Root Cause
The root cause is missing or insufficient validation on quantity-bounded input fields handled by the plugin. Without enforced limits or sanitization of the supplied data, the plugin processes attacker-controlled content as legitimate, enabling code or payload implantation. The scope-change classification indicates that exploitation impacts components beyond the vulnerable plugin itself.
Attack Vector
An attacker sends a crafted HTTP request to a WordPress endpoint exposed by the plugin. No credentials, prior access, or user interaction are required. Once the malicious payload is accepted, the attacker gains persistent code execution and can install additional backdoors, exfiltrate WooCommerce order data, or modify storefront content. Verified exploit code is not yet public, but the prerequisites are low enough that opportunistic mass scanning is likely.
No verified proof-of-concept code is available at this time. Refer to the Patchstack advisory for any further technical disclosures.
Detection Methods for CVE-2026-49777
Indicators of Compromise
- Unexpected PHP files in wp-content/plugins/woo-product-slider-pro/ or wp-content/uploads/ containing obfuscated or eval-based code
- New or modified administrator accounts in the WordPress wp_users table that do not map to known staff
- Outbound HTTP connections from the web server to unfamiliar domains shortly after plugin-related requests
- Changes to wp-config.php, .htaccess, or core WordPress files with recent modification timestamps
Detection Strategies
- Compare installed plugin file hashes against the official 3.5.4 release distributed via the WordPress plugin repository
- Inspect web server access logs for anomalous POST requests targeting plugin AJAX or REST endpoints under /wp-admin/admin-ajax.php and /wp-json/
- Scan the WordPress installation with file integrity monitoring tools to surface unauthorized writes
Monitoring Recommendations
- Forward WordPress, PHP-FPM, and web server logs to a centralized log platform and alert on plugin endpoint anomalies
- Monitor outbound network traffic from web servers for connections to known malware command-and-control infrastructure
- Track creation of new administrative users and changes to user roles in near real time
How to Mitigate CVE-2026-49777
Immediate Actions Required
- Update Product Slider Pro for WooCommerce to version 3.5.4 or later on every WordPress site where it is installed
- Audit the plugin directory, uploads folder, and database for signs of implanted code or rogue administrator accounts
- Rotate WordPress administrator passwords, WooCommerce API keys, and any secrets stored in wp-config.php after patching
Patch Information
The vendor has released Product Slider Pro for WooCommerce version 3.5.4, which addresses the improper input validation. Apply the update through the WordPress plugin manager or via WP-CLI. Confirm the installed version matches 3.5.4 before returning the site to production. Details are documented in the Patchstack Vulnerability Report.
Workarounds
- Deactivate and remove the plugin until the patched version can be installed if immediate updating is not possible
- Restrict access to WordPress admin and REST endpoints using a web application firewall with virtual patching rules
- Take a known-good backup before remediation so forensic analysis can be performed if compromise is suspected
# Update Product Slider Pro for WooCommerce using WP-CLI
wp plugin update woo-product-slider-pro --version=3.5.4
wp plugin list --name=woo-product-slider-pro --fields=name,status,version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
