CVE-2021-39174

mediumpriority · attend · 47EPSS 0.050 · 92 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

5.01% (92nd) EPSS

CVSS 6.5 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–8.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · security-advisories@github.comexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-75USCWE-75US

exploits (2)

Public proof-of-concept and weaponised exploit code.

hadrian3689/cachet_2.4.0-devCVE-2021-39174 Cachet 2.4.0-devPoC · poc_in_github
n0kovo/CVE-2021-39174-PoCCachet configuration leak dumper. CVE-2021-39174 PoC.PoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

fiveai Cachet≤ < 2.5.1enisa_euvdEU
catchethq catchet< 2.5.1nvdUScpe:2.3:a:catchethq:catchet:*:*:*:*:*:*:*:*
Packagist cachethq/cachet< 2.5.1osvUSpkg:composer/cachethq/cachet

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-88f9-7xxh-c688Cachet configuration leak2021-08-30ghsa · osvUS
### 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](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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-08-28modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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