# CVE-2026-39655: WordPress Mayosis Core plugin <= 5.4.7 - Broken Access Control vulnerability

> Attackers can bypass access controls in the Mayosis Core WordPress plugin to perform unauthorized actions.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 26 May 2026
- **Updated:** 26 May 2026
- **Also known as:** GHSA-hpcp-j63f-vvmq

## What is CVE-2026-39655?

CVE-2026-39655 is a medium-severity missing authorization vulnerability in TeconceTheme Mayosis Core, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Missing Authorization vulnerability in TeconceTheme Mayosis Core allows Exploiting Incorrectly Configured Access Control Security Levels.

This issue affects Mayosis Core: from n/a through 5.4.7.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-39655?


## How do I fix CVE-2026-39655?

No fix has been published for CVE-2026-39655 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-39655 being exploited?

There is no known exploitation of CVE-2026-39655 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-39655 and fix it if it is affected.

What it is: CVE-2026-39655 is a medium-severity missing authorization vulnerability in TeconceTheme Mayosis Core, published on 26 May 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-2026-39655 in the wild and no public exploit code.

Affected product: TeconceTheme Mayosis Core. 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-2026-39655/ (Markdown: https://insights.sbomify.com/CVE-2026-39655/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-39655
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-39655
- OSV: https://osv.dev/vulnerability/CVE-2026-39655

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-39655/
Summaries are generated and may contain mistakes; the official description above is the record.