CVE-2021-39174
Configuration leak
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Configuration leak
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.
- Record
CVE-2021-39174- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-75
- Updated
- 2026-11-02
EUVDEUVD-2021-1634
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.
- Record
EUVD-2021-1634- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-88f9-7xxh-c688
Cachet configuration leak
Impact
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).
Patches
This issue was addressed by improving UpdateConfigCommandHandler and preventing the use of nested variables in the resulting dotenv configuration file.
Workarounds
Only allow trusted source IP addresses to access to the administration dashboard.
References
Further technical details are available at https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection.
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.
- Record
GHSA-88f9-7xxh-c688- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-75
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-39174- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-75
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-39174- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-88f9-7xxh-c688
Cachet configuration leak
Impact
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).
Patches
This issue was addressed by improving UpdateConfigCommandHandler and preventing the use of nested variables in the resulting dotenv configuration file.
Workarounds
Only allow trusted source IP addresses to access to the administration dashboard.
References
Further technical details are available at https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection.
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.
- Record
GHSA-88f9-7xxh-c688- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-75
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cachethq/cachetPackagist |
through 2.5.0 | 2.5.1 |
cachethq/cachetPackagist |
before 2.5.1, plus listed versions v0.1.0-alphav1.0.0v1.1.0v1.1.1v1.2.0 Show 45 moreShow lessv1.2.1v2.0.0v2.0.0-RC1v2.0.0-RC2v2.0.0-RC3v2.0.0-RC4v2.0.0-RC5v2.0.0-beta1v2.0.0-beta2v2.0.1v2.0.2v2.0.3v2.0.4v2.1.0v2.1.0-RC1v2.1.0-RC2v2.1.1v2.1.2v2.2.0v2.2.0-RC1v2.2.1v2.2.2v2.2.3v2.2.4v2.3.0v2.3.0-RC1v2.3.0-RC2v2.3.0-RC3v2.3.0-RC4v2.3.0-RC5v2.3.0-RC6v2.3.1v2.3.10v2.3.11v2.3.12v2.3.13v2.3.14v2.3.15v2.3.16v2.3.17v2.3.18v2.3.2v2.3.3v2.3.4v2.3.5 |
2.5.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | hadrian3689/cachet_2.4.0-dev | 2022-06-21 |
| PoC in GitHub | n0kovo/CVE-2021-39174-PoC | 2022-05-03 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-39174 is a high vulnerability (CVSS 8.8) in Cachethq Cachet, published August 27, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 5.01%, the 92nd percentile. Fixed in cachethq/cachet 2.5.1.
References
Left out here: 6 versions. The JSON record has them.