CVE-2008-5557 describes a heap-based buffer overflow vulnerability in the mbstring extension of PHP versions 4.3.0 through 5.2.6. This flaw allows remote attackers to execute arbitrary code by supplying a specially crafted string containing an HTML entity to functions like mb_convert_encoding or mb_check_encoding, which mishandle Unicode conversion. With a CVSS score of 10.0, this vulnerability is critical, indicating a network-exploitable attack with no authentication required, leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.3.0CPE matchmatch criteria | cpe:2.3:a:php:php:4.3.0:*:*:*:*:*:*:* | ||
4.3.1CPE matchmatch criteria | cpe:2.3:a:php:php:4.3.1:*:*:*:*:*:*:* | ||
4.3.2CPE matchmatch criteria | cpe:2.3:a:php:php:4.3.2:*:*:*:*:*:*:* | ||
4.3.3CPE matchmatch criteria | cpe:2.3:a:php:php:4.3.3:*:*:*:*:*:*:* | ||
4.3.4CPE matchmatch criteria | cpe:2.3:a:php:php:4.3.4:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.