CVE-2025-27111: Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
6.9
CVSS
Description
Rack is a modular Ruby web server interface. The Rack::Sendfile middleware logs unsanitised header values from the X-Sendfile-Type header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection. This vulnerability is fixed in 2.2.12, 3.0.13, and 3.1.11.
Classification
CVE ID: CVE-2025-27111
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.9
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Problem Types
CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') CWE-117: Improper Output Neutralization for LogsAffected Products
Vendor: rack
Product: rack
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.08% (probability of being exploited)
EPSS Percentile: 19.89% (scored less or equal to compared to others)
EPSS Date: 2025-04-02 (when was this score calculated)
Stakeholder-Specific Vulnerability Categorization (SSVC)
SSVC Exploitation: none
SSVC Technical Impact: partial
SSVC Automatable: true
References
https://nvd.nist.gov/vuln/detail/CVE-2025-27111https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v
https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53
https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b
https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3