# CVE-2026-16587: Missing authorization in Advanced Form Integration — Connect Forms to 200+ Apps

> Authenticated subscribers can overwrite MailUp OAuth tokens, hijacking form data or breaking integration due to missing authorization checks.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:** 28 Jul 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-r4fx-q4j5-7gqg

## What is CVE-2026-16587?

CVE-2026-16587 is a medium-severity missing authorization vulnerability in nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Advanced Form Integration — Connect Forms to 200+ Apps plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.6.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the site's stored MailUp OAuth tokens in the adfoin_mailup_keys option with attacker-controlled tokens, hijacking future form-submission data to a MailUp account they control or nulling the tokens to break the integration entirely. This is exploitable by any authenticated user who can reach /wp-admin/profile.php, as admin_init fires for all logged-in users visiting any wp-admin page.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-16587?


## How do I fix CVE-2026-16587?

No fix has been published for CVE-2026-16587 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16587 being exploited?

There is no known exploitation of CVE-2026-16587 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16587 and fix it if it is affected.

What it is: CVE-2026-16587 is a medium-severity missing authorization vulnerability in nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps, published on 28 Jul 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-2026-16587 in the wild and no public exploit code.

Affected product: nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps. 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-2026-16587/ (Markdown: https://insights.sbomify.com/CVE-2026-16587/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16587
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16587
- OSV: https://osv.dev/vulnerability/CVE-2026-16587

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16587/
Summaries are generated and may contain mistakes; the official description above is the record.