Cachet vulnerable to new line injection during configuration edition
Impact
Authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server.
Patches
This issue was addressed by improving UpdateConfigCommandHandler and preventing the use of new lines characters in new configuration values.
Workarounds
Only allow trusted source IP addresses to access to the administration dashboard.
References
For more information
If you have any questions or comments about this advisory, you can contact:
- The original reporters, by sending an email to vulnerability.research [at] sonarsource.com;
- The maintainers, by opening an issue on this repository.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | cachethq/cachet | < 2.5.1 | 2.5.1 |
References
- https://github.com/fiveai/Cachet/security/advisories/GHSA-9jxw-cfrh-jxq6
- https://nvd.nist.gov/vuln/detail/CVE-2021-39172
- https://github.com/fiveai/Cachet/commit/6442976c25930cb370c65a22784b9caee7ed1de2
- https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection
- https://github.com/fiveai/Cachet
- https://github.com/fiveai/Cachet/releases/tag/v2.5.1
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-93- Platform
- Composer
- Package
cachethq/cachet- Disclosed
- 30.08.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-9jxw-cfrh-jxq6 - CC BY 4.0
Vulnerability history: cachethq/cachet
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 08.2021 10.2026
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 4
- Medium 1
Disclosures per year
- 2021: 4
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 1
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Cachet vulnerable to new line injection during configuration edition this entry
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