CVE-2026-111255

affiliate-toolkit <= 3.9.2 - Authenticated (Contributor+) Arbitrary File Upload via 'atkp_product_largeimageurl' Parameter

Published Oct 28, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Cservit
Cservit affiliate-toolkit – Multi-network Affiliate & Amazon Product Display
Wordpress-extensions
Wordpress-extensions affiliate-toolkit
Vendors & Products Cservit
Cservit affiliate-toolkit – Multi-network Affiliate & Amazon Product Display
Wordpress-extensions
Wordpress-extensions affiliate-toolkit
Type Values Removed Values Added
Description 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.
Title affiliate-toolkit <= 3.9.2 - Authenticated (Contributor+) Arbitrary File Upload via 'atkp_product_largeimageurl' Parameter
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Oct 28, 2026, 4:10 PM
Reserved
Oct 15, 2026, 6:50 PM
Status
Deferred
Published
Oct 28, 2026, 4:17 AM
Modified
Oct 28, 2026, 5:17 PM