Vulnerability Details CVE-2011-1398
The sapi_header_op function in main/SAPI.c in PHP before 5.3.11 and 5.4.x before 5.4.0RC2 does not check for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.119
EPSS Ranking 93.5%
CVSS Severity
CVSS v2 Score 4.3
Products affected by CVE-2011-1398