Sonaar CVE-2026-39647

The SSRF requires the Sonaar player to actively process and fetch remote audio URLs, playlists, or streaming metadata without strict URL validation. Exploitation is conditional on the plugin being enabled and configured to handle remote content sources (e.g., external M3U playlists, stream proxying, or HTTP-based radio feeds); default installations with only local or whitelisted streams may not be exploitable. High attack complexity (AC:H) suggests additional barriers such as WordPress authentication context, CSRF token validation, or specific plugin settings (e.g., remote playback feature must be enabled, or the SSRF endpoint must be exposed via a public-facing parameter without additional restrictions).

CVSS 5.4 (AV:N/AC:H/PR:N/UI:N) indicates network-accessible SSRF with high attack complexity and no authentication barrier, but restricted to low confidentiality and integrity impact (no availability loss or scope expansion). EPSS 0.02% (4th percentile) strongly signals low real-world exploitation probability, suggesting either high technical friction in weaponization, limited installed base actively using vulnerable versions, or minimal attacker incentive. No CISA KEV designation and no public POC identified indicates this is a theoretical rather than immediately actionable threat. The high attack complexity (AC:H) likely reflects WordPress permission models, plugin configuration, or unusual deployment contexts required for exploitation. Security teams should deprioritize this below confirmed active threats but include in routine patch cycles.

An attacker crafts a malicious URL or injects a specially-formed parameter into the Sonaar player's audio URL handling function (e.g., a playlist feed parameter or stream proxy endpoint) that causes the WordPress server to make an outbound request to http://169.254.169.254/latest/meta-data (AWS metadata), http://localhost:6379 (internal Redis), or an internal application port. The attacker then captures or infers the response to enumerate internal services, extract credentials, or trigger actions on internal APIs. High attack complexity may require specific plugin configuration (e.g., remote playlist parsing enabled, proxy mode active) or unusual WordPress deployment (public-facing admin, disabled security headers).