Unauthorized Data Modification in AnnunciFunebri Plugin via Missing Capability Check

Executive Summary

The vulnerability in the AnnunciFunebri Impresa WordPress plugin allows authenticated users with Subscriber-level access or higher to modify data without proper authorization. This happens because the annfu_reset_options() function lacks a capability check, enabling these users to delete all 29 plugin options and reset the plugin to its default state.

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Impact Analysis

This vulnerability can impact you by allowing low-privileged authenticated users to reset the plugin's settings to default, potentially disrupting the plugin's intended functionality and causing loss of customized configurations.

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Detection Guidance

This vulnerability can be detected by checking if the AnnunciFunebri Impresa WordPress plugin version is 4.7.0 or earlier and by monitoring for unauthorized calls to the annfu_reset_options() function, which resets plugin options. Since the vulnerability allows authenticated users with Subscriber-level access or above to reset plugin options, you can detect suspicious activity by auditing WordPress user actions or logs for unexpected option resets. Specific commands are not provided in the resources, but you can use WordPress CLI commands to check the plugin version, for example: `wp plugin get annuncifunebri-onoranza --field=version`. Additionally, monitoring HTTP requests to the plugin's endpoints or custom logs for calls to annfu_reset_options() could help detect exploitation attempts. [1, 3]

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Mitigation Strategies

Immediate mitigation steps include updating the AnnunciFunebri Impresa plugin to a version later than 4.7.0 where the missing capability check on annfu_reset_options() is fixed. If an update is not immediately available, restrict or audit user roles to prevent Subscriber-level or higher users from accessing or triggering the vulnerable function. Additionally, monitor and restrict access to the plugin's reset functionality and consider implementing custom capability checks or temporary patches to block unauthorized option resets. [1, 3]

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