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Vulnerability record · public intelligence
CVE-2019-16676
UNKNOWN

Improper Input Validation in simple_form

Published Sep 30, 2019 · Updated Nov 3, 2026

Severity · CVSSUNKNOWN · Not scored
Known exploitationNot listed
EPSS / likelihood3.40%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

Improper Input Validation in simple_form

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

## Incorrect Access Control in `file_method?` in `lib/simple_form/form_builder.rb`; a user-supplied string is invoked as a method call

Potential impact

For pages that build a form using user input, it is possible for an attacker to manipulate the input and send any method present in the form object. For example: The string provided in the variable @usersuppliedstring would be invoked as a method call inside the @user object (unless the string contains any of the following: password, timezone, country, email, phone and url). By manipulation that input, an attacker could do any of the following: - Code execution (call actions like destroy) - Denial of Service (by executing a computation intensive method) - Information Disclosure (check the presence of methods, leak user information)

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
MEDIUM
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. GitHub advisory ↗
  2. Security advisory ↗
  3. blog.plataformatec.com.br ↗

Record history

Published Sep 30, 2019 · Last refreshed Nov 3, 2026

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