{"id":"CVE-2013-5704","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-5704","generatedAt":"2026-11-05T07:06:38.341Z","title":"The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass \"RequestHeader unset\" directives by placing a header in the trailer portion of data sent with chunked transfer coding.","description":"The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass \"RequestHeader unset\" directives by placing a header in the trailer portion of data sent with chunked transfer coding.  NOTE: the vendor states \"this is not a security issue in httpd as such.\"","published":"2014-04-15T10:55:11.000Z","lastModified":"2026-06-16T23:59:16.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N"},"cwe":[],"affected":["apache/http server","redhat/enterprise linux desktop","redhat/enterprise linux eus","redhat/enterprise linux server","redhat/enterprise linux server aus","redhat/enterprise linux server tus","redhat/enterprise linux workstation","redhat/jboss enterprise web server","oracle/enterprise manager ops center","oracle/http server","oracle/linux","oracle/solaris","apple/mac os x","apple/mac os x server","canonical/ubuntu linux"],"epss":{"score":0.57992,"percentile":0.99091,"date":"2026-11-04","history":[{"date":"2026-09-27","score":0.5264,"percentile":0.98933},{"date":"2026-10-22","score":0.5667,"percentile":0.99064},{"date":"2026-10-24","score":0.57992,"percentile":0.99091}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 58.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=apache-httpd-dev&m=139636309822854&w=2","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=143403519711434&w=2","tags":["Issue Tracking","Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=144493176821532&w=2","tags":["Issue Tracking","Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://martin.swende.se/blog/HTTPChunked.html","tags":["Broken Link","Exploit","Third Party 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