{"cve":"CVE-2021-39173","nvd":{"published":"2021-08-27T23:15:06.957","modified":"2026-06-17T04:03:14.790","status":"Modified","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 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-704"],"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-r67m-m8c7-jp83","https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/","https://github.com/fiveai/Cachet/releases/tag/v2.5.1"],"products":["catchethq:catchet"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-39173","score":0.02362,"percentile":0.83787,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}