# CVE-2021-3901: Cross-Site Request Forgery in firefly-iii

Source: https://junglewise.ai/threats/cve-2021-3901-cross-site-request-forgery-in-firefly-iii  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-10-28  
License: CC BY 4.0 with a link back

CVE-2021-3901 · Severity: low · CVSS 3 · Published 2021-10-28

Cross-Site Request Forgery in firefly-iii

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-2021-3901 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-3901 being exploited in the wild.

**How severe is CVE-2021-3901?** Low severity, with a CVSS score of 3, published 28 October 2021.

**Which products and versions are affected?** grumpydictator/firefly-iii (Packagist) ECOSYSTEM:introduced=0,last_affected=5.6.2.

**Is there a fix for CVE-2021-3901?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2021-3901?** 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.

## Affected products

- grumpydictator/firefly-iii (Packagist) ECOSYSTEM:introduced=0,last_affected=5.6.2

## Identifiers

- CVE-2021-3901
- GHSA-rqgp-ccph-5w65

## 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)