CVE-2009-5017 describes a cross-site scripting (XSS) bypass vulnerability in Mozilla Firefox versions prior to 3.6 Beta 3. This flaw arises from improper handling of overlong UTF-8 encoding, allowing remote attackers to circumvent XSS protection mechanisms with a specially crafted string. The vulnerability has a CVSS score of 4.3 (medium severity), indicating a network-based attack with medium complexity, requiring no authentication, and resulting in partial integrity impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.6CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:beta2:*:*:*:*:*:* | ||
3.6CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:3.6:beta1:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:M/Au:N/C:N/I:P/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.