{"id":"CVE-2013-2503","aliases":["DEBIAN-CVE-2013-2503","EUVD-2013-2449","GHSA-xwv2-6j43-gjcx","UBUNTU-CVE-2013-2503"],"status":"published","title":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers...","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","severity":{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.04632,"percentile":0.91769,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-20"],"published":"2013-03-11T17:00:00Z","modified":"2026-09-01T20:03:16Z","exploits":[{"source":"exploitdb","id":"EDB-38377","title":"Privoxy Proxy - Authentication Information Disclosure","type":"webapps","platform":"php","date":"2013-03-11","verified":true,"url":"https://www.exploit-db.com/exploits/38377"}],"fixes":[{"ecosystem":"Debian:12","package":"privoxy","fixed_in":["3.0.21-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"privoxy","fixed_in":["3.0.21-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"privoxy","fixed_in":["3.0.21-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"privoxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.21-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"privoxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.21-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"privoxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.21-1"}]}]}],"products":[{"vendor":"privoxy","product":"privoxy"}],"references":[{"url":"http://blog.c22.cc/2013/03/11/privoxy-proxy-authentication-credential-exposure-cve-2013-2503/","tags":["x_refsource_MISC","x_transferred","Exploit","evidence","report"]},{"url":"http://ijbswa.cvs.sourceforge.net/viewvc/ijbswa/current/ChangeLog?revision=1.188\u0026view=markup","tags":["x_refsource_CONFIRM","x_transferred","web","report"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-03/msg00118.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-2503"},{"url":"http://blog.c22.cc/2013/03/11/privoxy-proxy-authentication-credential-exposure-cve-2013-2503"},{"url":"https://github.com/advisories/GHSA-xwv2-6j43-gjcx"},{"url":"https://security-tracker.debian.org/tracker/CVE-2013-2503","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2013-2503","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2013-2503","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2013-2503","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"published","published":"2013-03-11T17:00:00Z","modified":"2024-08-06T15:44:32.095Z","updated_at":"2026-11-02T14:34:56.530545Z"}],"euvd":[{"id":"EUVD-2013-2449","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"published","published":"2013-03-11T17:00:00Z","modified":"2024-08-06T15:44:32Z","updated_at":"2026-11-03T01:56:38.194266Z"}],"ghsa":[{"id":"GHSA-xwv2-6j43-gjcx","title":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers...","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"published","published":"2022-05-17T05:12:00Z","modified":"2025-04-11T04:09:13Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:01:13.537017Z"}],"nvd":[{"id":"CVE-2013-2503","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"published","published":"2013-03-11T17:55:01.83Z","modified":"2026-06-16T23:53:35.44Z","cvss":[{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:24.091325Z"}],"osv":[{"id":"CVE-2013-2503","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"published","published":"2013-03-11T17:55:01Z","modified":"2026-04-10T03:43:20.962465Z","updated_at":"2026-11-02T15:43:59.09154Z"},{"id":"DEBIAN-CVE-2013-2503","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"published","published":"2013-03-11T17:55:01.83Z","modified":"2026-09-01T20:03:16.512962443Z","updated_at":"2026-11-02T15:45:25.514579Z"},{"id":"UBUNTU-CVE-2013-2503","description":"Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.","status":"withdrawn","published":"2013-03-11T17:55:00Z","modified":"2025-07-16T08:10:44.109773Z","updated_at":"2026-11-02T15:54:07.421078Z"}]}}