Fluent Forms Pro Add On Pack Plugin up to 6.1.17 on WordPress Attachment Deletion deleteFile attachment_id authorization

Summaryinfo

A vulnerability identified as critical has been detected in Fluent Forms Pro Add On Pack Plugin up to 6.1.17 on WordPress. This affects the function deleteFile of the component Attachment Deletion Handler. Performing a manipulation of the argument attachment_id results in authorization. This vulnerability is known as CVE-2026-2899. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Fluent Forms Pro Add On Pack Plugin up to 6.1.17 on WordPress. This affects the function deleteFile of the component Attachment Deletion Handler. The manipulation of the argument attachment_id with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity, and availability. The summary by CVE is:

The Fluent Forms Pro Add On Pack plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 6.1.17. This is due to the `deleteFile()` method in the `Uploader` class lacking nonce verification and capability checks. The AJAX action is registered via `addPublicAjaxAction()` which creates both `wp_ajax_` and `wp_ajax_nopriv_` hooks. This makes it possible for unauthenticated attackers to delete arbitrary WordPress media attachments via the `attachment_id` parameter. Note: The researcher described file deletion via the `path` parameter using `sanitize_file_name()`, but the actual code uses `Protector::decrypt()` for path-based deletion which prevents exploitation. The vulnerability is exploitable via the `attachment_id` parameter instead.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-2899. 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 of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/05/2026).

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Name

• Fluent Forms Pro Add On Pack Plugin

Version

• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17

CPE 2.3info

• 🔒
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CPE 2.2info

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Entryinfo

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