devozon Fense Proxy & VPN Blocker Plugin up to 3.0.1 on WordPress Settings fense_bpvt_save_settings improper authorization

Summaryinfo

A vulnerability, which was classified as critical, has been found in devozon Fense Proxy & VPN Blocker Plugin up to 3.0.1. The affected element is the function fense_bpvt_save_settings of the component Settings Handler. Performing a manipulation results in improper authorization. This vulnerability is reported as CVE-2026-8616. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in devozon Fense Proxy & VPN Blocker Plugin up to 3.0.1. This affects the function fense_bpvt_save_settings of the component Settings Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-8616 since 05/14/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/17/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• devozon

Name

• Fense Proxy & VPN Blocker Plugin

Version

• 3.0.0
• 3.0.1

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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