Wpeverest Everest Forms Plugin up to 3.4.4 on WordPress Upload Field class-evf-form-task.php load_previous_field_value POST server-side request forgery

Summaryinfo

A vulnerability classified as problematic was found in Wpeverest Everest Forms Plugin up to 3.4.4. The affected element is the function load_previous_field_value of the file class-evf-form-task.php of the component Upload Field. The manipulation of the argument POST results in server-side request forgery. This vulnerability is reported as CVE-2026-5096. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Wpeverest Everest Forms Plugin up to 3.4.4. Affected is the function load_previous_field_value of the file class-evf-form-task.php of the component Upload Field. The manipulation of the argument POST with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality. CVE summarizes:

The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` data for upload fields without domain restriction, which are then passed to `wp_remote_head()` in the `get_local_file_size()` method of `class-evf-form-fields-upload.php`. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-5096 since 03/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/28/2026).

By approaching the search of inurl:class-evf-form-task.php it is possible to find vulnerable targets with Google Hacking.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Wpeverest

Name

• Everest Forms Plugin

Version

• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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