CVE-2021-39173

moderate-risk
Published 2021-08-27

Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

Do I need to act?

~
3.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Catchethq

References (6)

Exploit https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-inj...
Release Notes https://github.com/fiveai/Cachet/releases/tag/v2.5.1
Third Party Advisory https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83
Exploit https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-inj...
Release Notes https://github.com/fiveai/Cachet/releases/tag/v2.5.1
Third Party Advisory https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83
42
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 7/34 · Low
Exposure 5/34 · Minimal