CVE-2026-32459 in UpsellWP Plugin
Summary
by MITRE • 03/13/2026
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in flycart UpsellWP checkout-upsell-and-order-bumps allows Blind SQL Injection.This issue affects UpsellWP: from n/a through <= 2.2.4.
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Analysis
by VulDB Data Team • 03/15/2026
The vulnerability identified as CVE-2026-32459 represents a critical SQL injection flaw within the flycart UpsellWP plugin, specifically in the checkout-upsell-and-order-bumps component. This weakness enables attackers to manipulate SQL commands through improperly neutralized special elements, creating a pathway for blind SQL injection attacks that can compromise database integrity and confidentiality. The vulnerability exists in UpsellWP versions ranging from the initial release through and including version 2.2.4, indicating a broad impact across multiple iterations of the plugin's codebase.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the plugin's database query execution processes. When user-supplied data is directly incorporated into SQL commands without proper escaping or parameterization, attackers can inject malicious SQL code that executes with the privileges of the database user. The blind nature of this injection means that attackers cannot directly observe database responses, requiring them to infer information through indirect methods such as timing attacks or conditional responses, which makes detection more challenging but does not reduce the severity of the threat.
Operational impact of this vulnerability extends beyond simple data theft to encompass complete system compromise and potential data destruction. An attacker exploiting this flaw could extract sensitive customer information including personal details, payment information, and order histories from the affected WordPress installation. The vulnerability also enables privilege escalation attacks where malicious actors might gain administrative access to the WordPress site, potentially leading to complete site takeover. Additionally, the compromised system could serve as a staging ground for further attacks within the network infrastructure, making this vulnerability particularly dangerous for e-commerce environments where customer data protection is paramount.
Mitigation strategies for this vulnerability should prioritize immediate remediation through plugin updates to versions that address the SQL injection weakness. Organizations must also implement robust input validation mechanisms, employ parameterized queries, and establish proper database access controls to minimize potential exploitation surfaces. The vulnerability aligns with CWE-89, which specifically addresses SQL injection flaws, and maps to ATT&CK technique T1071.004 for application layer protocol manipulation. Security monitoring should include detection of unusual database query patterns and implementation of web application firewalls to prevent exploitation attempts. Regular security audits and vulnerability assessments remain essential for identifying similar weaknesses in other plugins and system components that might present comparable risks to the overall security posture.