CVE-2017-20179: A vulnerability was found in InSTEDD Pollit 2.3.1

Routine

MEDIUM 6.3DOWNGRADE

CVE-2017-20179 is a medium-severity flaw (CVSS 6.3) affecting pollit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in InSTEDD Pollit 2.3.1. It has been rated as critical. This issue affects the function TourController of the file app/controllers/tour_controller.rb. The manipulation leads to an unknown weakness. The attack may be initiated remotely. Upgrading to version 2.3.2 is able to address this issue. The patch is named 6ef04f8b5972d5f16f8b86f8b53f62fac68d5498. It is recommended to upgrade the affected component. The associated i

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Published	2023-02-21
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: instedd

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

Am I affected?

Timeline

2023-02-21 21:15 UTCPublished CVE record published
2026-06-17 01:15 UTCUpdated Record last modified

instedd pollit DOWNGRADE

Affected: 2.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.1

1. Check installed version

apt-cache policy pollit || rpm -q pollit || pollit --version

2. No fixed release: DOWNGRADE to a release before 2.3.1 (Debian / Ubuntu)

apt-cache madison pollit sudo apt install pollit=<VERSION_BEFORE_2.3.1> sudo apt-mark hold pollit

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pollit sudo dnf downgrade pollit-<VERSION_BEFORE_2.3.1> sudo dnf versionlock add pollit

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-2017-20179?

pollit: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-20179 being exploited?

CVE-2017-20179 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-2017-20179 affect?

CVE-2017-20179 affects pollit. Severity is medium (CVSS 6.3). A vulnerability was found in InSTEDD Pollit 2.3.1. It has been rated as critical. This issue affects the function TourController of the file app/controllers/tour_controller.rb. The manipulation leads to an unknown weakness. The attack may b

How urgent is CVE-2017-20179?

Priority 36/100. No elevated risk signals yet.

References

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