CVE-2020-16252: The Field Test gem 0.2.0 through 0.3.2 for Ruby allows CSRF.

Routine

MEDIUM 4.3UPGRADE

CVE-2020-16252 is a medium-severity flaw (CVSS 4.3) affecting field test. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Field Test gem 0.2.0 through 0.3.2 for Ruby allows CSRF.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-352
Published	2020-08-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: field test project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-08-05 14:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

field test project field test UPGRADE

Affected: >= 0.2.0 and <= 0.3.2

Fixed in: newer than 0.3.2

Safe to downgrade to: a release before 0.2.0

1. Check installed version

apt-cache policy field-test || rpm -q field-test || field-test --version

2. UPGRADE to newer than 0.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade field-test

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade field-test

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.2.0 (Debian / Ubuntu)

apt-cache madison field-test sudo apt install field-test=<VERSION_BEFORE_0.2.0> sudo apt-mark hold field-test

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list field-test sudo dnf downgrade field-test-<VERSION_BEFORE_0.2.0> sudo dnf versionlock add field-test

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-16252?

field test: upgrade to newer than 0.3.2. Exact commands for each OS are on this page.

Is CVE-2020-16252 being exploited?

CVE-2020-16252 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-16252 affect?

CVE-2020-16252 affects field test. Severity is medium (CVSS 4.3). The Field Test gem 0.2.0 through 0.3.2 for Ruby allows CSRF.

How urgent is CVE-2020-16252?

Priority 24/100. No elevated risk signals yet.

Software pages

Ruby vulnerabilities

Related CVEs

CVE-2019-13146 MEDIUM 5.3 DOWNGRADE The field_test gem 0.3.0 for Ruby has unvalidated input

References

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