# CVE-2026-85571: Tutor LMS 4.0.5 - 4.1.0 - Instructor+ Arbitrary Post Reparenting via IDOR

> Instructors can reassign any post to their own courses, stealing content and hiding others' posts due to missing ownership checks.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/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:** 10 Oct 2026
- **Updated:** 10 Oct 2026
- **Also known as:** GHSA-p4r6-qc79-jj5f

## What is CVE-2026-85571?

CVE-2026-85571 is a medium-severity missing authorization vulnerability in Unknown Tutor LMS, published on 10 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The Tutor LMS  WordPress plugin before 4.1.1 does not verify that the posts named in its course content ordering requests belong to a course the requester manages, allowing users with instructor level access to reassign the parent of any post on the site, taking other instructors' course content into their own courses and making arbitrary published content unreachable.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-85571?


## How do I fix CVE-2026-85571?

No fix has been published for CVE-2026-85571 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85571 being exploited?

There is no known exploitation of CVE-2026-85571 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85571 and fix it if it is affected.

What it is: CVE-2026-85571 is a medium-severity missing authorization vulnerability in Unknown Tutor LMS, published on 10 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-85571 in the wild and no public exploit code.

Affected product: Unknown Tutor LMS. 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-2026-85571/ (Markdown: https://insights.sbomify.com/CVE-2026-85571/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85571
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85571
- OSV: https://osv.dev/vulnerability/CVE-2026-85571

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85571/
Summaries are generated and may contain mistakes; the official description above is the record.