# CVE-2026-111311: File upload in DoubleScale CRM | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter, Booking, Helpdesk, Automation, MCP & More

> Authenticated subscribers can upload executable files via the Helpdesk module, 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:** 16 Oct 2026
- **Updated:** 16 Oct 2026
- **Also known as:** GHSA-rv9x-w2pf-2f69

## What is CVE-2026-111311?

CVE-2026-111311 is a high-severity vulnerability in samuelgallegos DoubleScale CRM | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter, Booking, Helpdesk, Automation, MCP & More, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The DoubleScale | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter, Booking, Helpdesk, Automation, MCP & More plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.5.1 via the store_upload function. This is due to a fail-open extension allow-list in extension_is_allowed() that returns true when wp_check_filetype() yields an empty type for unrecognized extensions such as .php, combined with magic-byte-only MIME detection and no capability check beyond is_user_logged_in(). This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. Exploitation requires the Helpdesk module to be enabled, as the vulnerable REST endpoint is only registered when that module is active.

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

## Which versions are affected by CVE-2026-111311?


## How do I fix CVE-2026-111311?

No fix has been published for CVE-2026-111311 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111311 being exploited?

There is no known exploitation of CVE-2026-111311 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111311 and fix it if it is affected.

What it is: CVE-2026-111311 is a high-severity vulnerability in samuelgallegos DoubleScale CRM | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter, Booking, Helpdesk, Automation, MCP & More, published on 16 Oct 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-2026-111311 in the wild and no public exploit code.

Affected product: samuelgallegos DoubleScale CRM | All-in-One CRM – Sales, Multi-Channel Marketing, Newsletter, Booking, Helpdesk, Automation, MCP & More. 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-2026-111311/ (Markdown: https://insights.sbomify.com/CVE-2026-111311/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111311
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111311
- OSV: https://osv.dev/vulnerability/CVE-2026-111311

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-111311/
Summaries are generated and may contain mistakes; the official description above is the record.