smartSEO WordPress Theme CVE-2025-28953

Exploitation requires the attacker to possess valid WordPress user credentials with at least low-privilege access (subscriber role or higher, corresponding to PR:L in CVSS vector). The smartSEO theme must be actively installed and enabled on the target WordPress site. Specific vulnerable functionality within the theme must be accessible to the authenticated user role - typical SEO themes expose configuration interfaces to contributors/authors for meta tag management, which would satisfy this condition. Network accessibility (AV:N) means exploitation works remotely over HTTP/HTTPS without requiring local system access. No user interaction beyond the attacker's own actions is required (UI:N). Default WordPress multi-user configurations allowing subscriber registration would meet these conditions, while single-administrator WordPress sites with no additional user accounts significantly reduce attack surface despite the vulnerability's technical presence.

Real-world risk assessment reveals moderate-but-manageable threat profile. CVSS 8.5 (High) reflects network accessibility, low attack complexity, and high confidentiality impact with scope change - meaning attackers can access data beyond the theme's normal authorization boundaries. However, PR:L (low-privilege authentication required) significantly constrains exploitation to attackers who already possess valid WordPress credentials (subscriber-level or higher). EPSS 0.05% (15th percentile) indicates extremely low observed exploitation in the wild, consistent with the authentication barrier and niche theme deployment. No CISA KEV listing confirms this is not being actively exploited at scale. The confidentiality-only impact (I:N in CVSS vector) means attackers can read sensitive data but not modify database contents through this specific vulnerability, though the A:L rating suggests potential for denial-of-service through resource-intensive queries. Primary concern is unauthorized access to WordPress configuration data, user credentials, or customer information in multi-tenant environments where scope change (S:C) allows cross-boundary access. For organizations not using this specific theme, risk is zero; for those running smartSEO with multiple user roles, prioritize patching but exploitation requires insider access or compromised credentials.

An attacker with low-privilege WordPress credentials (subscriber or contributor account) accesses smartSEO theme functionality and injects malicious SQL syntax into a vulnerable input field such as SEO meta configuration or sitemap generation parameters. The injected SQL commands execute with the privileges of the WordPress database user, allowing the attacker to extract sensitive information including password hashes for administrator accounts, API keys stored in wp_options table, or customer data from WooCommerce tables if present. The scope change (S:C) in CVSS vector enables accessing data outside the theme's intended authorization boundary, potentially compromising the entire WordPress database.