CVE-2018-25352 in Ultimate Form Builder Lite Plugin
Summary
by MITRE • 05/23/2026
WordPress Ultimate Form Builder Lite plugin version 1.3.7 and below contains an SQL injection vulnerability that allows authenticated attackers to manipulate database queries by injecting SQL code through the entry_id POST parameter. Attackers can send POST requests to the admin-ajax.php endpoint with the ufbl_get_entry_detail_action action to extract, modify, or escalate privileges within the WordPress database.
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Analysis
by VulDB Data Team • 05/24/2026
The WordPress Ultimate Form Builder Lite plugin presents a critical sql injection vulnerability affecting versions 1.3.7 and earlier, which enables authenticated attackers to execute malicious sql commands through the entry_id parameter. This flaw resides within the admin-ajax.php endpoint and specifically targets the ufbl_get_entry_detail_action action, creating a pathway for unauthorized database manipulation. The vulnerability stems from insufficient input validation and sanitization of user-supplied data, allowing attackers to inject sql code that bypasses normal security controls and executes with elevated privileges within the wordpress environment.
The technical exploitation of this vulnerability occurs through crafted post requests sent to the admin-ajax.php file with the targeted action parameter. When an authenticated user with sufficient privileges submits a request containing malicious sql code within the entry_id field, the plugin fails to properly escape or validate the input before incorporating it into database queries. This lack of proper input sanitization creates a direct injection point where attacker-controlled sql fragments can be executed against the underlying database system. The vulnerability is particularly dangerous because it leverages existing administrative privileges, eliminating the need for additional authentication mechanisms. According to cwe-89, this represents a classic sql injection flaw where user-supplied data is directly incorporated into sql commands without proper validation or escaping.
The operational impact of this vulnerability extends beyond simple data extraction to encompass potential privilege escalation and full database compromise. Attackers can leverage this vulnerability to retrieve sensitive information including user credentials, form submissions, and other database contents that may contain personal or confidential data. The authenticated nature of the attack means that even limited user accounts can potentially escalate their privileges or access restricted information within the wordpress installation. This vulnerability affects the integrity and confidentiality of the entire wordpress system, as database-level access allows for modification of core system data, user accounts, and form configurations. The attack vector specifically targets the plugin's administrative functions, making it particularly concerning for wordpress installations that rely heavily on form processing and data collection capabilities.
Mitigation strategies for this vulnerability require immediate patching of the affected plugin to version 1.3.8 or later, which implements proper input validation and sanitization measures. System administrators should also implement additional security controls including wp core and plugin updates, input validation at multiple layers, and monitoring of admin-ajax.php requests for suspicious patterns. The use of web application firewalls can help detect and block malicious sql injection attempts, while regular security audits should verify that all plugins maintain proper input handling practices. Organizations should also consider implementing principle of least privilege models to limit the scope of potential damage from authenticated attacks. According to mitre att&ck framework, this vulnerability aligns with techniques targeting credential access and privilege escalation through application-level flaws, emphasizing the need for comprehensive application security testing and regular vulnerability assessments to prevent similar issues in other wordpress plugins and components.