# CVE-2021-3730: firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)

Source: https://junglewise.ai/threats/cve-2021-3730-firefly-iii-is-vulnerable-to-cross-site-request-forgery-csrf  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-08-25  
License: CC BY 4.0 with a link back

CVE-2021-3730 · Severity: low · CVSS 3 · Published 2021-08-25

firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)

Technologies: [grumpydictator/firefly-iii (Packagist)](https://junglewise.ai/threats/technologies/grumpydictator-firefly-iii). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2021-3730 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-3730 being exploited in the wild.

**How severe is CVE-2021-3730?** Low severity, with a CVSS score of 3, published 25 August 2021.

**Which products and versions are affected?** grumpydictator/firefly-iii (Packagist) ECOSYSTEM:introduced=0,fixed=5.6.0.

**Is there a fix for CVE-2021-3730?** Yes. grumpydictator/firefly-iii (Packagist): upgrade to 5.6.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-3730?** Check whether you run grumpydictator/firefly-iii (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

- grumpydictator/firefly-iii (Packagist): upgrade to 5.6.0 or later

  ```sh
  composer require grumpydictator/firefly-iii:^5.6.0
  ```


## Affected products

- grumpydictator/firefly-iii (Packagist) ECOSYSTEM:introduced=0,fixed=5.6.0

## Identifiers

- CVE-2021-3730
- GHSA-c676-mcw3-qg55

## Related threats

- [Project Firefly III SSRF in webhook management component](https://junglewise.ai/threats/cve-2026-50886-project-firefly-iii-ssrf-in-webhook-management-component)
- [Firefly III Stored XSS in Audit Log Entry via piggy bank name](https://junglewise.ai/threats/firefly-iii-stored-xss-in-audit-log-entry-via-piggy-bank-name-79c37ea2)
- [Firefly III user API endpoints expose all users' information to any authenticated user (IDOR)](https://junglewise.ai/threats/firefly-iii-user-api-endpoints-expose-all-users-information-to-any-28231c21)
- [Firefly III has a MFA bypass in oauth flow](https://junglewise.ai/threats/cve-2024-37893-firefly-iii-has-a-mfa-bypass-in-oauth-flow)
- [C5 Firefly III CSV Injection.](https://junglewise.ai/threats/c5-firefly-iii-csv-injection-f3c22e29)