VULNERABILITY INTELLIGENCE
CVE-2008-5557
CVSS score10 HIGH
EPSS probability7.37%
CISA KEVNot currently listed
Published2008-12-23
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Description
Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0 through 5.2.6 allows context-dependent attackers to execute arbitrary code via a crafted string containing an HTML entity, which is not properly handled during Unicode conversion, related to the (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, and (4) mb_parse_str functions.
Weakness classification
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer