# CVE-2026-111255: The affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display plugin for WordPress is vulnerable to Arbitrary File Upload in all


- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 28 Oct 2026
- **Updated:** 28 Oct 2026
- **Also known as:** GHSA-6wvw-5jhh-gcg4

## What is CVE-2026-111255?

CVE-2026-111255 is a high-severity vulnerability in cservit affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display, published on 28 Oct 2026. 

### Official 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.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2026-111255?


## How do I fix CVE-2026-111255?

No fix has been published for CVE-2026-111255 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111255 being exploited?

There is no known exploitation of CVE-2026-111255 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111255 and fix it if it is affected.

What it is: CVE-2026-111255 is a high-severity vulnerability in cservit affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display, published on 28 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-111255 in the wild and no public exploit code.

Affected product: cservit affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-111255/ (Markdown: https://insights.sbomify.com/CVE-2026-111255/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111255
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111255
- OSV: https://osv.dev/vulnerability/CVE-2026-111255

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111255/
Summaries are generated and may contain mistakes; the official description above is the record.