CVE-2025-5103 identifies a boolean-based SQL Injection vulnerability in the Ultimate Gift Cards for WooCommerce plugin for WordPress, present in all versions up to and including 3.1.4. The root cause is insufficient escaping and lack of proper preparation of user-supplied input parameters 'default_price' and 'product_id' within SQL queries. This flaw allows authenticated users with Administrator or higher privileges to append additional SQL commands to existing queries. The injection is boolean-based, enabling attackers to infer sensitive information from the database by manipulating query logic. Since the vulnerability requires high privileges and no user interaction, it is exploitable only by trusted users who have already compromised or legitimately hold administrative access. The CVSS v3.1 score is 4.9 (medium), reflecting the network attack vector, low attack complexity, required privileges, and high confidentiality impact but no impact on integrity or availability. No patches or known exploits are currently available, but the vulnerability poses a risk of unauthorized data disclosure, including potentially sensitive customer or business information stored in the database. The plugin is widely used in WooCommerce-based e-commerce sites, which are prevalent globally, making this a relevant threat for many organizations relying on this software for gift card functionality.

The primary impact of this vulnerability is unauthorized disclosure of sensitive information stored in the WordPress database, such as customer data, transaction details, or configuration settings. Although exploitation requires administrator-level access, the vulnerability can be leveraged by malicious insiders or attackers who have already gained elevated privileges, amplifying the damage potential. The confidentiality breach could lead to data leaks, compliance violations (e.g., GDPR), reputational damage, and potential financial loss. Since the vulnerability does not affect data integrity or availability, it does not enable data modification or service disruption directly. However, the ability to extract sensitive data can facilitate further attacks, including credential theft or lateral movement within the network. Organizations using this plugin in their e-commerce infrastructure are at risk, particularly those with large customer bases or sensitive transactional data. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as proof-of-concept code could emerge.

1. Immediate mitigation involves upgrading the Ultimate Gift Cards for WooCommerce plugin to a patched version once available from the vendor. Monitor vendor communications for official security updates. 2. Until a patch is released, restrict administrator-level access strictly to trusted personnel and enforce strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of privilege abuse. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious SQL injection patterns targeting the 'default_price' and 'product_id' parameters. 4. Conduct regular security audits and database access monitoring to detect unusual query patterns or data extraction attempts. 5. Harden WordPress installations by disabling unnecessary plugins and limiting plugin permissions. 6. Employ database activity monitoring tools to alert on anomalous queries indicative of injection attempts. 7. Educate administrators on the risks of SQL injection and the importance of secure plugin management. 8. Consider isolating the WordPress environment and database with network segmentation to limit lateral movement if compromise occurs.