CVE-2025-6348 identifies a time-based SQL Injection vulnerability in the Smart Slider 3 plugin for WordPress, present in all versions up to and including 3.5.1.28. The root cause is improper neutralization of special elements used in SQL commands (CWE-89), specifically due to insufficient escaping of the 'sliderid' parameter supplied by users. This parameter is incorporated into SQL queries without adequate preparation or parameterization, allowing attackers with Administrator-level access to append additional SQL commands. The vulnerability enables attackers to perform time-based blind SQL Injection attacks, which can be used to extract sensitive information from the backend database by measuring response delays. Exploitation requires authenticated access with high privileges, which limits the attack vector to insiders or compromised administrator accounts. The CVSS v3.1 base score is 4.9 (medium severity), reflecting network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, high confidentiality impact, and no impact on integrity or availability. No patches or known exploits are currently reported, but the vulnerability represents a significant risk to data confidentiality for affected WordPress sites using this plugin. The vulnerability is publicly disclosed and assigned CVE-2025-6348, with Wordfence as the assigner. Organizations relying on Smart Slider 3 should monitor for updates and consider interim mitigations.

The primary impact of this vulnerability is the potential unauthorized disclosure of sensitive information stored in the WordPress site's database. Since the attack requires Administrator-level privileges, the threat is mainly from malicious insiders or attackers who have already compromised an administrator account. Successful exploitation can lead to leakage of user data, configuration details, or other confidential information, undermining data confidentiality. Although integrity and availability are not directly impacted, the breach of confidentiality can have severe consequences including regulatory non-compliance, reputational damage, and further exploitation of leaked data. Given WordPress's widespread use globally and the popularity of Smart Slider 3, numerous websites could be at risk, especially those with less stringent access controls or insufficient monitoring. The lack of known exploits in the wild reduces immediate risk but does not eliminate the potential for future attacks. Organizations with public-facing WordPress sites that use this plugin should consider this vulnerability a significant concern for data protection.

1. Restrict Administrator Access: Limit the number of users with Administrator-level privileges to reduce the attack surface. 2. Monitor Administrator Activities: Implement logging and monitoring of administrator actions and database queries to detect suspicious behavior indicative of SQL Injection attempts. 3. Apply Principle of Least Privilege: Ensure that WordPress roles and database permissions follow least privilege principles, minimizing potential damage from compromised accounts. 4. Use Web Application Firewalls (WAF): Deploy WAFs with rules to detect and block SQL Injection patterns targeting the 'sliderid' parameter. 5. Disable or Remove Plugin if Not Essential: If Smart Slider 3 is not critical, consider disabling or uninstalling it until a patch is available. 6. Stay Updated: Monitor vendor announcements and security advisories for patches or updates addressing this vulnerability and apply them promptly once released. 7. Harden WordPress Security: Employ multi-factor authentication for administrators and regularly audit user accounts to prevent unauthorized access. 8. Database Hardening: Restrict database user permissions used by WordPress to only necessary operations, limiting the impact of SQL Injection. These measures collectively reduce the likelihood and impact of exploitation until an official patch is available.