# CVE-2026-4065: Missing authorization in Smart Slider 3

> Authenticated contributors can read slider metadata and manipulate image records due to missing capability checks in Smart Slider 3.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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:** 7 Apr 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-m7hj-m974-fx49

## What is CVE-2026-4065?

CVE-2026-4065 is a medium-severity missing authorization vulnerability in nextendweb Smart Slider 3, published on 7 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Smart Slider 3 plugin for WordPress is vulnerable to unauthorized access and modification of data due to missing capability checks on multiple wp_ajax_smart-slider3 controller actions in all versions up to, and including, 3.5.1.33. The display_admin_ajax() method does not call checkForCap() (which requires unfiltered_html capability), and several controller actions only validate the nonce (validateToken()) without calling validatePermission(). This makes it possible for authenticated attackers, with Contributor-level access and above, to enumerate slider metadata and create, modify, and delete image storage records by obtaining the nextend_nonce exposed on post editor pages.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-4065?


## How do I fix CVE-2026-4065?

No fix has been published for CVE-2026-4065 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4065 being exploited?

There is no known exploitation of CVE-2026-4065 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4065 and fix it if it is affected.

What it is: CVE-2026-4065 is a medium-severity missing authorization vulnerability in nextendweb Smart Slider 3, published on 7 Apr 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-2026-4065 in the wild and no public exploit code.

Affected product: nextendweb Smart Slider 3. 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-2026-4065/ (Markdown: https://insights.sbomify.com/CVE-2026-4065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4065
- OSV: https://osv.dev/vulnerability/CVE-2026-4065

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4065/
Summaries are generated and may contain mistakes; the official description above is the record.