cservit Affiliate Toolkit Plugin up to 3.9.2 on WordPress Image Download upload_image unrestricted upload

Summaryinfo

A vulnerability, which was classified as critical, was found in cservit Affiliate Toolkit Plugin up to 3.9.2. This affects the function upload_image of the component Image Download. Such manipulation leads to unrestricted upload. This vulnerability is listed as CVE-2026-111255. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in cservit Affiliate Toolkit Plugin up to 3.9.2. It has been rated as critical. Affected by this issue is the function upload_image of the component Image Download. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.9.2 via the upload_image function. This is due to insufficient file type validation in upload_image due to a weak Content-Type prefix check and extension derivation from the attacker-controlled URL path, with no dangerous-extension stripping. This makes it possible for authenticated attackers, with contributor-level access and above, to upload files that may be executable, which makes remote code execution possible. Exploitation requires the "import product image" option to be enabled in the plugin settings, as this activates the image download pipeline triggered on product post save.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-111255 since 10/15/2026. The exploitation is known to be easy. The attack may be launched remotely. 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 10/28/2026). The MITRE ATT&CK project declares the attack technique as T1608.002.

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

• cservit

Name

• Affiliate Toolkit Plugin

Version

• 3.9.0
• 3.9.1
• 3.9.2

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CPE 2.2info

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