# CVE-2026-6020: ShopLentor <= 3.3.7 - Authenticated (Administrator+) Arbitrary Function Execution via 'callback' Parameter via REST API

> Administrators can execute arbitrary PHP functions via the REST API due to unsafe callback handling in the ShopLentor plugin.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Aug 2026
- **Updated:** 5 Aug 2026
- **Also known as:** GHSA-m4f6-5759-q864

## What is CVE-2026-6020?

CVE-2026-6020 is a high-severity code injection vulnerability in devitemsllc ShopLentor – All-in-One WooCommerce Growth & Store Enhancement Plugin, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The ShopLentor plugin for WordPress is vulnerable to arbitrary function execution via the woolentoropt/v1/custom-action REST API endpoint in all versions up to, and including, 3.3.7. This is due to the handle_action() method passing user-supplied input directly to call_user_func() without an allowlist of permitted callbacks. This makes it possible for authenticated attackers, with Administrator-level access and above, to execute arbitrary PHP callable functions via the 'callback' parameter.

Weakness: CWE-470 (Use of Externally-Controlled Input to Select Classes or Code)

## Which versions are affected by CVE-2026-6020?


## How do I fix CVE-2026-6020?

No fix has been published for CVE-2026-6020 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6020 being exploited?

There is no known exploitation of CVE-2026-6020 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6020 and fix it if it is affected.

What it is: CVE-2026-6020 is a high-severity code injection vulnerability in devitemsllc ShopLentor – All-in-One WooCommerce Growth & Store Enhancement Plugin, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6020 in the wild and no public exploit code.

Affected product: devitemsllc ShopLentor – All-in-One WooCommerce Growth & Store Enhancement Plugin. 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-2026-6020/ (Markdown: https://insights.sbomify.com/CVE-2026-6020/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6020
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6020
- OSV: https://osv.dev/vulnerability/CVE-2026-6020

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-6020/
Summaries are generated and may contain mistakes; the official description above is the record.