# CVE-2025-11976: Cross-site request forgery in FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.)

> Unauthenticated attackers can trick administrators into creating or editing sync rules via CSRF, potentially altering marketing automation configurations.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 Oct 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-p4jw-m7hw-hjrg

## What is CVE-2025-11976?

CVE-2025-11976 is a medium-severity vulnerability in FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.), published on 25 Oct 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.) plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.1.23.0. This is due to missing or incorrect nonce validation on the save_changes function. This makes it possible for unauthenticated attackers to add or edit sync rules via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2025-11976?


## How do I fix CVE-2025-11976?

No fix has been published for CVE-2025-11976 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-11976 being exploited?

There is no known exploitation of CVE-2025-11976 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11976 and fix it if it is affected.

What it is: CVE-2025-11976 is a medium-severity vulnerability in FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.), published on 25 Oct 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-11976 in the wild and no public exploit code.

Affected product: FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.). 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-2025-11976/ (Markdown: https://insights.sbomify.com/CVE-2025-11976/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11976
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11976
- OSV: https://osv.dev/vulnerability/CVE-2025-11976

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-11976/
Summaries are generated and may contain mistakes; the official description above is the record.