CVE-2021-22903
- Source
- https://cve.org/CVERecord?id=CVE-2021-22903
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22903.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-22903
- Aliases
- Downstream
- Published
- 2021-06-11T16:15:11.437Z
- Modified
- 2026-07-08T21:25:57.969050Z
- Severity
-
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- [none]
- Details
-
The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example,
config.hosts << "sub.example.com"to permit a request with a Host header value ofsub-example.com. - References
Affected packages
Git / github.com/rails/rails
Affected ranges
- Type
- GIT
- Repo
- https://github.com/rails/rails
- Events
-
IntroducedFixedIntroducedLast affected
- Database specific
{ "cpe": [ "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*", "cpe:2.3:a:rubyonrails:rails:6.1.0:rc2:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "6.1.1" }, { "fixed": "6.1.3.2" }, { "introduced": "6.1.0-rc2" }, { "last_affected": "6.1.0-rc2" } ], "source": [ "CPE_RANGE", "CPE_STRING" ] }