# CVE-2026-4302: WowOptin: Next-Gen Popup Maker <= 1.4.29 - Unauthenticated Server-Side Request Forgery via 'link' Parameter in REST API

> Unauthenticated attackers can exploit a REST API endpoint to perform Server-Side Request Forgery, accessing internal services via arbitrary web requests.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Mar 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-jrvw-hv7x-27p4

## What is CVE-2026-4302?

CVE-2026-4302 is a high-severity server-side request forgery vulnerability in wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation, published on 21 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The WowOptin: Next-Gen Popup Maker plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.4.29. This is due to the plugin exposing a publicly accessible REST API endpoint (optn/v1/integration-action) with a permission_callback of __return_true that passes user-supplied URLs directly to wp_remote_get() and wp_remote_post() in the Webhook::add_subscriber() method without any URL validation or restriction. The plugin does not use wp_safe_remote_get/post which provide built-in SSRF protection. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application, which can be used to query and modify information from internal services.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-4302?


## How do I fix CVE-2026-4302?

No fix has been published for CVE-2026-4302 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4302 being exploited?

There is no known exploitation of CVE-2026-4302 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4302 and fix it if it is affected.

What it is: CVE-2026-4302 is a high-severity server-side request forgery vulnerability in wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation, published on 21 Mar 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-2026-4302 in the wild and no public exploit code.

Affected product: wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation. 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-2026-4302/ (Markdown: https://insights.sbomify.com/CVE-2026-4302/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4302
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4302
- OSV: https://osv.dev/vulnerability/CVE-2026-4302

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-4302/
Summaries are generated and may contain mistakes; the official description above is the record.