{"answers":{"affected":"2 open source packages ship an affected version, including actionpack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-22903 in the wild and no public exploit code.","fix":"Upgrade actionpack to 6.1.3.2 or later.","what":"CVE-2021-22903 is a medium-severity vulnerability in Rubyonrails Rails, published on 11 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-22903 and fix it if it is affected.\n\nWhat it is: CVE-2021-22903 is a medium-severity vulnerability in Rubyonrails Rails, published on 11 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-22903 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- actionpack (RubyGems): affected from 6.1.0.rc2; fixed in 6.1.3.2\n- actionpack (RubyGems): affected from 6.1.0.rc2; fixed in 6.1.3.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-22903/ (Markdown: https://insights.sbomify.com/CVE-2021-22903/index.md)","id":"CVE-2021-22903","markdown":"https://insights.sbomify.com/CVE-2021-22903/index.md","name":"CVE-2021-22903","record":{"aliases":["GHSA-5hq2-xf89-9jxq","UBUNTU-CVE-2021-22903"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Ruby on Rails","requires_auth":"none","summary":"Attackers can redirect users to malicious sites via crafted Host headers when specific allowed host configurations are used in Action Pack.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"rails","vendor":"rubyonrails"}],"cvss":{"score":6.1,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"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 \u003c\u003c \"sub.example.com\"` to permit a request with a Host header value of `sub-example.com`.","ecosystems":["RubyGems"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Possible Open Redirect Vulnerability in Action Pack","id":"CVE-2021-22903","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"rubyonrails:rails","products":["rubyonrails:rails"],"type":"open_redirect","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Possible DoS Vulnerability in Action Controller Token Authentication","id":"CVE-2021-22904"},"packages":[{"ecosystem":"RubyGems","fixed":["6.1.3.2"],"introduced":["6.1.0.rc2"],"last_affected":[],"package":"actionpack","purl":null,"source":"GHSA-5hq2-xf89-9jxq"},{"ecosystem":"RubyGems","fixed":["6.1.3.2"],"introduced":["6.1.0.rc2"],"last_affected":[],"package":"actionpack","purl":"pkg:gem/actionpack","source":"GHSA-5hq2-xf89-9jxq"}],"prev":{"headline":"Denial of Service in Action Dispatch","id":"CVE-2021-22902"},"products":["https://github.com/rails/rails"],"published":"2021-06-11","related":[{"cvss_score":10,"headline":"Active Record contains deserialization of arbitrary YAML","id":"CVE-2013-0277","kev_date_added":null,"published":"2013-02-13"},{"cvss_score":8.1,"headline":"SQL injection in n/a","id":"CVE-2017-17916","kev_date_added":null,"published":"2017-12-29"},{"cvss_score":8.1,"headline":"SQL injection in n/a","id":"CVE-2017-17917","kev_date_added":null,"published":"2017-12-29"},{"cvss_score":8,"headline":"Rails Active Storage has possible Path Traversal in DiskService","id":"CVE-2026-33195","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":7.5,"headline":"Rails possible ReDoS vulnerability in Accept header parsing in Action Dispatch","id":"CVE-2024-26142","kev_date_added":null,"published":"2024-02-27"},{"cvss_score":7.5,"headline":"ReDoS based DoS vulnerability in Action Dispatch","id":"CVE-2023-22792","kev_date_added":null,"published":"2023-02-09"},{"cvss_score":7.5,"headline":"Denial of Service in Action Dispatch","id":"CVE-2021-22902","kev_date_added":null,"published":"2021-06-11"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can redirect users to malicious sites via crafted Host headers when specific allowed host configurations are used in Action Pack.","url":"https://insights.sbomify.com/CVE-2021-22903/"}