CVE-2019-16676 json
Improper Input Validation in simple_form
published 2019-09-30 7 y ago modified 2026-08-27 2 mo ago also GHSA-r74q-gxcg-73hx , EUVD-2019-0676
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.4%
- EPSS 3.4% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
Plataformatec Simple Form has Incorrect Access Control in file_method? in lib/simple_form/form_builder.rb, because a user-supplied string is invoked as a method call.
Patch / fix
- rubygems simple_form 5.0.0
- plataformatec simple_form 5.0
Exploit prediction
3.40% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- blog.plataformatec.com.br http://blog.plataformatec.com.br/2019/09/incorrect-access-control-in-simple-form-cve-2019-16676/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | simple_form | <5.0.0 |
5.0.0 |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/plataformatec/simple_form/commits/master
web, patch, third-party-advisory
-
github.com
/heartcombo/simple_form/commit/8c91bd76a5052ddf3e3ab9fd8333f9aa7b2e2dd6
web
-
blog.plataformatec.com.br
/2019/09/incorrect-access-control-in-simple-form-cve-2019-16676/
exploit, vendor-advisory
-
github.com
/plataformatec/simple_form/security/advisories/GHSA-r74q-gxcg-73hx
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2019-16676
advisory
-
github.com
/advisories/GHSA-r74q-gxcg-73hx
advisory
-
github.com
/heartcombo/simple_form
package
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/simple_form/CVE-2019-16676.yml
web
-
blog.plataformatec.com.br
/2019/09/incorrect-access-control-in-simple-form-cve-2019-16676
web
Sources
- CVE List CVE-2019-16676
- GitHub Advisory GHSA-r74q-gxcg-73hx
- NVD CVE-2019-16676
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