PCRE before 8.36 mishandles the /((?(R)a|(?1)))+/ pattern and related patterns with certain recursion, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

Heap-based buffer overflow in PCRE 8.36 and earlier allows remote attackers to cause a denial of service (crash) or have other unspecified impact via a crafted regular expression, related to an assertion that allows zero repeats.

Cross-site scripting (XSS) vulnerability in upload/install/index.php in PHCDownload 1.1 allows remote attackers to inject arbitrary web script or HTML via the step parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

SQL injection vulnerability in admin/index.php in PHCDownload 1.1 allows remote attackers to execute arbitrary SQL commands via the hash parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Heap-based buffer overflow in pcre_compile.c in the Perl-Compatible Regular Expression (PCRE) library 7.7 allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a regular expression that begins with an option and contains multiple branches.

Buffer overflow in PCRE before 7.6 allows remote attackers to execute arbitrary code via a regular expression containing a character class with a large number of characters with Unicode code points greater than 255.

Cross-site scripting (XSS) vulnerability in search.php in PHCDownload 1.1.0 allows remote attackers to inject arbitrary web script or HTML via the string parameter.

SQL injection vulnerability in search.php in PHCDownload 1.1.0 allows remote attackers to execute arbitrary SQL commands via the string parameter.

Cross-site scripting (XSS) vulnerability in PHCDownload 1.10 allows remote attackers to inject arbitrary web script or HTML via the username field in an unspecified component. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Perl-Compatible Regular Expression (PCRE) library before 7.0 does not properly calculate the amount of memory needed for a compiled regular expression pattern when the (1) -x or (2) -i UTF-8 options change within the pattern, which allows context-dependent attackers to cause a denial of service (PCRE or glibc crash) via crafted regular expressions.