# Potential Remote Code Execution in TYPO3 with mediace extension

Advisory record · `GHSA-4h44-w6fm-548g`

- **Identifiers:** `GHSA-4h44-w6fm-548g` · `CVE-2020-15086` · `PKSA-h7r9-7xjm-kxrb`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-20](https://cwe.mitre.org/data/definitions/20.html) · [CWE-200](https://cwe.mitre.org/data/definitions/200.html) · [CWE-325](https://cwe.mitre.org/data/definitions/325.html) · [CWE-502](https://cwe.mitre.org/data/definitions/502.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md) · [Insecure deserialization](https://agentprime.io/advisories/tag/deserialization.md) · [CWE-20](https://agentprime.io/advisories/tag/cwe-20.md) · [CWE-325](https://agentprime.io/advisories/tag/cwe-325.md)
- **Published:** 29 Jul 2020
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 29 Jul 2020, 16:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `friendsoftypo3/mediace` (Packagist): affected `>=7.6.2, <7.6.5`; fixed in `7.6.5`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.036, the 89th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 29 Jul 2020. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-4h44-w6fm-548g](https://github.com/advisories/GHSA-4h44-w6fm-548g)
- [OSV: GHSA-4h44-w6fm-548g](https://osv.dev/vulnerability/GHSA-4h44-w6fm-548g)
- <https://github.com/FriendsOfTYPO3/mediace/security/advisories/GHSA-4h44-w6fm-548g>
- <https://nvd.nist.gov/vuln/detail/CVE-2020-15086>
- <https://github.com/FriendsOfTYPO3/mediace/pull/31>
- <https://github.com/FriendsOfTYPO3/mediace/commit/fa29ffd3e8b275782a8600d2406e1b1e5e16ae75>
- <https://github.com/FriendsOfPHP/security-advisories/blob/master/friendsoftypo3/mediace/CVE-2020-15086.yaml>
- <https://github.com/FriendsOfTYPO3/mediace>
- <https://typo3.org/security/advisory/typo3-ext-sa-2020-014>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-4h44-w6fm-548g>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-4h44-w6fm-548g/>. Everything for agents: <https://agentprime.io/llms.txt>.