# CVE-2026-104748: Privilege escalation in SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications

> Unauthenticated attackers can escalate privileges to Administrator by exploiting mass assignment in the SimpleForm WordPress plugin registration endpoint.

- **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:** 14 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-5hqh-jvjf-mpvw

## What is CVE-2026-104748?

CVE-2026-104748 is a critical vulnerability in wpazleen SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.10.0 This is due to the `wp_ajax_nopriv_simpleform_wp_register` AJAX action lacking any capability check for role assignment and the `save_custom_fields_to_user_meta()` function using an exclusion list that omits `wp_capabilities`, combined with `get_form_settings()` returning a hard-coded defaults array that unconditionally enables meta writing regardless of the supplied `form_id`. This makes it possible for unauthenticated attackers to create a new Administrator-level WordPress account by supplying `wp_capabilities[administrator]=1` alongside standard registration fields. The nonce required by the endpoint is publicly emitted into the `front_end_data` JavaScript object on every front-end page via `wp_enqueue_scripts`, making it trivially obtainable by any unauthenticated visitor before submitting the malicious request.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2026-104748?


## How do I fix CVE-2026-104748?

No fix has been published for CVE-2026-104748 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104748 being exploited?

There is no known exploitation of CVE-2026-104748 in the wild and no public exploit code.

Public exploit code:

- Unauthenticated privilege escalation in SimpleForm WordPress plugin <= 3.10.0. Registers an administrator account without authentication (github_poc): https://github.com/joshuavanderpoll/CVE-2026-104748
- CVE-2026-104748 POC (github_poc): https://github.com/MrjHaxcore/CVE-2026-104748

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104748 and fix it if it is affected.

What it is: CVE-2026-104748 is a critical vulnerability in wpazleen SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications, published on 14 Oct 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-2026-104748 in the wild and no public exploit code.

Affected product: wpazleen SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications. 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-2026-104748/ (Markdown: https://insights.sbomify.com/CVE-2026-104748/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104748
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104748
- OSV: https://osv.dev/vulnerability/CVE-2026-104748

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-104748/
Summaries are generated and may contain mistakes; the official description above is the record.