{"id":"CVE-2025-40927","summary":"CGI::Simple versions 1.281 and earlier for Perl has a HTTP response splitting flaw","details":"CGI::Simple versions before 1.282 for Perl has a HTTP response splitting flaw\nThis vulnerability is a confirmed HTTP response splitting flaw in CGI::Simple that allows HTTP response header injection, which can be used for reflected XSS or open redirect under certain conditions.\n\nAlthough some validation exists, it can be bypassed using URL-encoded values, allowing an attacker to inject untrusted content into the response via query parameters.\n\n\n\nAs a result, an attacker can inject a line break (e.g. %0A) into the parameter value, causing the server to split the HTTP response and inject arbitrary headers or even an HTML/JavaScript body, leading to reflected cross-site scripting (XSS), open redirect or other attacks.\n\nThe issue documented in CVE-2010-4410 https://www.cve.org/CVERecord?id=CVE-2010-4410 is related but the fix was incomplete.\n\nImpact\n\nBy injecting %0A (newline) into a query string parameter, an attacker can:\n\n  *  Break the current HTTP header\n  *  Inject a new header or entire body\n  *  Deliver a script payload that is reflected in the server’s response\nThat can lead to the following attacks:\n\n  *  reflected XSS\n  *  open redirect\n  *  cache poisoning\n  *  header manipulation","modified":"2026-07-15T01:49:05.854391660Z","published":"2025-08-29T00:10:07.161Z","related":["openSUSE-SU-2025:15625-1"],"database_specific":{"cwe_ids":["CWE-113"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40927.json","cna_assigner":"CPANSec"},"references":[{"type":"WEB","url":"https://cpan.org/modules"},{"type":"WEB","url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-2320"},{"type":"WEB","url":"https://metacpan.org/release/MANWAR/CGI-Simple-1.281/diff/MANWAR/CGI-Simple-1.282/lib/CGI/Simple.pm"},{"type":"WEB","url":"https://metacpan.org/release/MANWAR/CGI-Simple-1.281/source/lib/CGI/Simple.pm#L1031-1035"},{"type":"WEB","url":"https://rt.perl.org/Public/Bug/Display.html?id=21951"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40927.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40927"},{"type":"PACKAGE","url":"https://github.com/manwar/CGI--Simple"},{"type":"ARTICLE","url":"https://datatracker.ietf.org/doc/html/rfc7230#section-3"},{"type":"ARTICLE","url":"https://owasp.org/www-community/attacks/HTTP_Response_Splitting"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/manwar/cgi--simple","events":[{"introduced":"0"},{"fixed":"0c1a2e0b8f24804d33daac686666ac944363a630"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.282"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.280","v1.27","v1.26","v1.25","v1.24","v1.23","v1.22","v1.21","v1.20","v1.19","v1.18","v1.17","v1.16","v1.15","v1.14","v1.13","1.115","1.111","1.110","1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40927.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}