Risk Letters

Exploited vulnerability

CVE-2019-5418

TLP:CLEAR

Rails Ruby on Rails Path Traversal Vulnerability

Rails Ruby on Rails contains a path traversal vulnerability in Action View. Specially crafted accept headers in combination with calls to `render file:` can cause arbitrary files on the target server to be rendered, disclosing the file contents.

Facts

  • Vendor: Rails
  • Product: Ruby on Rails
  • CVSS: 7.5
  • EPSS (probability of exploitation within 30 days): 98.5 %
  • On CISA's Known Exploited Vulnerabilities list since: 7 July 2025
  • First known exploitation: 7 July 2025
  • CISA's deadline for US federal agencies: 28 July 2025
  • Weakness: CWE-22
  • First seen by Risk Letters: 7 July 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD