# CVE-2018-12027: Insecure Permissions in Phusion Passenger

Source: https://junglewise.ai/threats/cve-2018-12027-insecure-permissions-in-phusion-passenger  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-13  
License: CC BY 4.0 with a link back

CVE-2018-12027 · Severity: low · CVSS 3.1 · Published 2022-05-13

Insecure Permissions in Phusion Passenger

Technologies: [passenger (RubyGems)](https://junglewise.ai/threats/technologies/passenger). Vendors: [RubyGems](https://junglewise.ai/threats/vendors/rubygems).

## Quick answers

**Is CVE-2018-12027 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2018-12027 being exploited in the wild.

**How severe is CVE-2018-12027?** Low severity, with a CVSS score of 3.1, published 13 May 2022.

**Which products and versions are affected?** passenger (RubyGems) ECOSYSTEM:introduced=5.3.0,fixed=5.3.2.

**Is there a fix for CVE-2018-12027?** Yes. passenger (RubyGems): upgrade to 5.3.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2018-12027?** Check whether you run passenger (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- passenger (RubyGems): upgrade to 5.3.2 or later

  ```sh
  bundle update passenger
  ```


## Affected products

- passenger (RubyGems) ECOSYSTEM:introduced=5.3.0,fixed=5.3.2

## Identifiers

- CVE-2018-12027
- GHSA-whfx-877c-5p28

## Related threats

- [Phusion Passenger denial of service](https://junglewise.ai/threats/cve-2025-26803-phusion-passenger-denial-of-service)
- [Phusion Passenger Race Condition Allows Privilege Escalation](https://junglewise.ai/threats/cve-2018-12029-phusion-passenger-race-condition-allows-privilege-escalation)
- [Phusion Passenger SpawningKit Contains Arbitrary Read/Write Vulnerability](https://junglewise.ai/threats/cve-2018-12026-phusion-passenger-spawningkit-contains-arbitrary-read-write)
- [Phusion Passenger incorrect permission assignment](https://junglewise.ai/threats/cve-2018-12615-phusion-passenger-incorrect-permission-assignment)
- [Incorrect Access Control in Phusion Passenger](https://junglewise.ai/threats/cve-2018-12028-incorrect-access-control-in-phusion-passenger)