CVE-2026-8616
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
The Fense Proxy & VPN Blocker plugin for WordPress up to version 3.0.1 is vulnerable to unauthorized data modification due to missing capability checks and nonce validation in the fense_bpvt_save_settings() function. This function is registered to both authenticated and unauthenticated AJAX hooks, allowing unauthenticated attackers to delete plugin options and transients, resetting the API key cache and forcing a state refetch.
Risk Assessment
The risk is that an unauthenticated attacker can reset the plugin's configuration, potentially disrupting proxy and VPN filtering, leading to security bypasses or data exposure.
Recommendation
Update the Fense Proxy & VPN Blocker plugin to the latest patched version immediately. If no update is available, temporarily disable the plugin until a fix is released.
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Original NVD description (English source)
The Fense Proxy & VPN Blocker plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and missing nonce validation on the fense_bpvt_save_settings() function in versions up to, and including, 3.0.1. The callback is registered to both wp_ajax_* and wp_ajax_nopriv_* hooks and unconditionally calls delete_option() on four plugin options and delete_transient() on three transients tied to the plugin's API key cache and settings. This makes it possible for unauthenticated attackers to delete plugin options and transients, effectively resetting the plugin's API key/data cache and forcing the plugin to refetch state.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

