CVE-2021-3900 json
Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii
published 2021-10-27 5 y ago modified 2026-06-17 4 mo ago also GHSA-pfj7-w373-gqch , EUVD-2021-2235
- cvss
- 4.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)
Patch / fix
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/909e55b6-ef02-4143-92e4-bc3e8397db76 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 4.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | grumpydictator/firefly-iii | <=5.6.2 |
no fix listed |
Affected products
- firefly-iii firefly-iii/firefly-iii
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
github.com
/firefly-iii/firefly-iii/commit/c2c8c42ef3194d1aeba8c48240fe2e9063f77635
web, patch, third-party-advisory
-
huntr.dev
/bounties/909e55b6-ef02-4143-92e4-bc3e8397db76
web, exploit, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3900
advisory
-
github.com
/firefly-iii/firefly-iii
package
Sources
- CVE List CVE-2021-3900
- GitHub Advisory GHSA-pfj7-w373-gqch
- NVD CVE-2021-3900
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.