# CVE-2026-16098: File upload in ProSolution WP Client

> Unauthenticated attackers can upload executable files via filename override, leading to remote code execution on sites using the ProSolution WP Client plugin.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Aug 2026
- **Updated:** 18 Aug 2026
- **Also known as:** GHSA-7vxm-f6w4-qrp3

## What is CVE-2026-16098?

CVE-2026-16098 is a critical vulnerability in ProSolution WP Client, published on 16 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.0.10 via the proSol_handleFileUpload function. This is due to missing validation of the attacker-controlled Content-Disposition header filename, which overrides the allow-listed multipart filename before the file is saved, and a post-save extension check that fails to delete the already-written file. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The nonce required to reach the upload handler is publicly exposed via wp_localize_script on any front-end page rendering the job portal shortcode, allowing unauthenticated visitors to obtain a valid nonce and bypass that gating check entirely.

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

## Which versions are affected by CVE-2026-16098?


## How do I fix CVE-2026-16098?

No fix has been published for CVE-2026-16098 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16098 being exploited?

There is no known exploitation of CVE-2026-16098 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16098 and fix it if it is affected.

What it is: CVE-2026-16098 is a critical vulnerability in ProSolution WP Client, published on 16 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-16098 in the wild and no public exploit code.

Affected product: ProSolution WP Client. 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-2026-16098/ (Markdown: https://insights.sbomify.com/CVE-2026-16098/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16098
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16098
- OSV: https://osv.dev/vulnerability/CVE-2026-16098

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16098/
Summaries are generated and may contain mistakes; the official description above is the record.