# CVE-2025-13859: Cross-site scripting in AffiliateX – Amazon Affiliate Plugin

> Authenticated subscribers can inject malicious JavaScript via customization settings, leading to stored XSS execution for site visitors.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jan 2026
- **Updated:** 15 Jan 2026
- **Also known as:** GHSA-rr8m-86pp-xxjf

## What is CVE-2025-13859?

CVE-2025-13859 is a medium-severity cross-site scripting vulnerability in wpcenter AffiliateX – Amazon Affiliate Plugin, published on 15 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The AffiliateX – Amazon Affiliate Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_customization_settings AJAX action in versions 1.0.0 to 1.3.9.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store arbitrary JavaScript that executes whenever an AffiliateX block renders on the site.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2025-13859?


## How do I fix CVE-2025-13859?

No fix has been published for CVE-2025-13859 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-13859 being exploited?

There is no known exploitation of CVE-2025-13859 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-13859 and fix it if it is affected.

What it is: CVE-2025-13859 is a medium-severity cross-site scripting vulnerability in wpcenter AffiliateX – Amazon Affiliate Plugin, published on 15 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-13859 in the wild and no public exploit code.

Affected product: wpcenter AffiliateX – Amazon Affiliate Plugin. 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-2025-13859/ (Markdown: https://insights.sbomify.com/CVE-2025-13859/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-13859
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-13859
- OSV: https://osv.dev/vulnerability/CVE-2025-13859

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-13859/
Summaries are generated and may contain mistakes; the official description above is the record.