What’s Vulnerable › Vulnerabilities

CVE-2021-39174: Configuration leak

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-28 · updated 2026-06-17
• Weakness: CWE-75

Description

Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can leak the value of any configuration entry of the dotenv file, e.g. the application secret (`APP_KEY`) and various passwords (email, database, etc). This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of nested variables in the resulting dotenv configuration file. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

Affected products

• Catchethq Catchet: before 2.5.1 — fixed in 2.5.1

How to fix

Upgrade to a fixed version: Catchethq Catchet 2.5.1. Check the vendor advisory for mitigations.

References

• https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/
• https://github.com/fiveai/Cachet/releases/tag/v2.5.1
• https://github.com/fiveai/Cachet/security/advisories/GHSA-88f9-7xxh-c688
• https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/
• https://github.com/fiveai/Cachet/releases/tag/v2.5.1
• https://github.com/fiveai/Cachet/security/advisories/GHSA-88f9-7xxh-c688

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