# CVE-2021-3129: Unauthenticated remote code execution in Ignition

Source: https://junglewise.ai/threats/cve-2021-3129-laravel-ignition-file-upload-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-03-29. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-3129 · Severity: critical · CVSS 3.1 · Exploited in the wild · Published 2021-03-29

Ignition before 2.5.2, as used in Laravel and other products, contains a file upload vulnerability due to insecure usage of file_get_contents() and file_put_contents(). Unauthenticated remote attackers can exploit this on sites using debug mode to execute arbitrary code.

Technologies: [Laravel Ignition](https://junglewise.ai/threats/technologies/ignition), [facade/ignition (Packagist)](https://junglewise.ai/threats/technologies/facade-ignition). Vendors: [Laravel](https://junglewise.ai/threats/vendors/laravel), [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2021-3129 exploited in the wild?** Yes. CVE-2021-3129 is known to be exploited in the wild, first recorded on 18 September 2023. Treat it as urgent.

**How severe is CVE-2021-3129?** Critical severity, with a CVSS score of 3.1, published 29 March 2021.

**Which products and versions are affected?** facade/ignition (Packagist) ECOSYSTEM:introduced=2.5.0,fixed=2.5.2.

**Is there a fix for CVE-2021-3129?** Yes. facade/ignition (Packagist): upgrade to 2.5.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2021-3129 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2021-3129?** Check whether you run Laravel Ignition or facade/ignition (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- facade/ignition (Packagist): upgrade to 2.5.2 or later

  ```sh
  composer require facade/ignition:^2.5.2
  ```


## Affected products

- Facade Ignition < 2.5.2
- Laravel Laravel < 8.4.2

## Identifiers

- CVE-2021-3129
- GHSA-4qwp-7c67-jmcc

## Timeline

- 2021-01-20: disclosed: Initial NVD analysis date
- 2023-09-18: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-09-18: advisory

## Related threats

- [Incorrect Access Control in Ignition](https://junglewise.ai/threats/cve-2021-43996-incorrect-access-control-in-ignition)
- [Critical severity vulnerability in Ignition](https://junglewise.ai/threats/cve-2020-13909-critical-severity-vulnerability-in-ignition)