# CVE-2026-1499: WP Duplicate <= 1.1.8 - Authenticated (Subscriber+) Arbitrary File Upload via 'process_add_site' AJAX Action

> Authenticated subscribers can exploit missing authorization and path traversal to upload arbitrary files, leading to remote code execution.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 6 Feb 2026
- **Updated:** 14 Apr 2026
- **Also known as:** GHSA-r262-f4qm-hrp9

## What is CVE-2026-1499?

CVE-2026-1499 is a high-severity vulnerability in revmakx WP Duplicate – WordPress Migration Plugin, published on 6 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The WP Duplicate plugin for WordPress is vulnerable to Missing Authorization leading to Arbitrary File Upload in all versions up to and including 1.1.8. This is due to a missing capability check on the `process_add_site()` AJAX action combined with path traversal in the file upload functionality. This makes it possible for authenticated (subscriber-level) attackers to set the internal `prod_key_random_id` option, which can then be used by an unauthenticated attacker to bypass authentication checks and write arbitrary files to the server via the `handle_upload_single_big_file()` function, ultimately leading to remote code execution.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-1499?


## How do I fix CVE-2026-1499?

No fix has been published for CVE-2026-1499 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1499 being exploited?

There is no known exploitation of CVE-2026-1499 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1499 and fix it if it is affected.

What it is: CVE-2026-1499 is a high-severity vulnerability in revmakx WP Duplicate – WordPress Migration Plugin, published on 6 Feb 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-2026-1499 in the wild and no public exploit code.

Affected product: revmakx WP Duplicate – WordPress Migration 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-2026-1499/ (Markdown: https://insights.sbomify.com/CVE-2026-1499/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1499
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1499
- OSV: https://osv.dev/vulnerability/CVE-2026-1499

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1499/
Summaries are generated and may contain mistakes; the official description above is the record.