wpmudev Hustle Plugin up to 7.8.14.3 on WordPress ESP Integration authorization

Summaryinfo

A vulnerability categorized as problematic has been discovered in wpmudev Hustle Plugin up to 7.8.14.3. This affects an unknown part of the component ESP Integration. The manipulation results in authorization. This vulnerability is identified as CVE-2026-109386. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in wpmudev Hustle Plugin up to 7.8.14.3. It has been classified as problematic. Affected is an unknown functionality of the component ESP Integration. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on integrity. CVE summarizes:

The Hustle – Email Marketing, Lead Generation, Optins, Popups plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 7.8.14.3. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to overwrite the site's active ESP integration credentials (AWeber, Constant Contact, Infusionsoft, ConvertKit, or HubSpot API keys) with attacker-controlled values — diverting all subsequent Hustle form lead submissions to the attacker's ESP tenant — and, for HubSpot, irreversibly delete the operator's OAuth token, OAuth referer, and OAuth current-page option rows. This requires the attacker to hold the plugin-granted hustle_create capability (e.g., an Editor delegated hustle_create but not hustle_edit_integrations via Hustle's Permissions tab), which allows them to load a Hustle module wizard page and obtain the hustle_provider_action nonce needed to reach the vulnerable handlers.

The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-109386 since 10/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/31/2026).

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

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Productinfo

Type

• WordPress Plugin

Vendor

• wpmudev

Name

• Hustle Plugin

Version

• 7.8.14.0
• 7.8.14.1
• 7.8.14.2
• 7.8.14.3

CPE 2.3info

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CPE 2.2info

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