CVE-2026-111255 json
affiliate-toolkit <= 3.9.2 - Authenticated (Contributor+) Arbitrary File Upload via 'atkp_product_largeimageurl' Parameter
published 12d ago modified 12d ago also EUVD-2026-111574
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Is CVE-2026-111255 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 12d ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- cservit affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/272a8ee4-8689-4935-89c5-e2f502621511?source=cve
- plugins.trac.wordpress.org /browser/affiliate-toolkit-starter/tags/3.9.2/includes/basics/ATKPTools.php#L657
- plugins.trac.wordpress.org /browser/affiliate-toolkit-starter/tags/3.9.2/includes/basics/ATKPTools.php#L710
- plugins.trac.wordpress.org /browser/affiliate-toolkit-starter/tags/3.9.2/includes/atkp_posttypes_product.php#L3192
- plugins.trac.wordpress.org /browser/affiliate-toolkit-starter/tags/3.9.2/includes/dataservices/atkp_productservice.php#L775
- plugins.trac.wordpress.org /browser/affiliate-toolkit-starter/tags/3.9.2/includes/basics/ATKPTools.php#L546
- plugins.trac.wordpress.org /changeset?reponame=&old=3759575%40affiliate-toolkit-starter&new=3759575%40affiliate-toolkit-starter
Sources
- CVE List CVE-2026-111255
- NVD CVE-2026-111255
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.