AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2009-5017

MEDIUM · CVSS 4.3 EPSS 1.87%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2010-11-12 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.3. It affects Firefox. It may be remotely exploitable.

CVE
CVE-2009-5017
Severity
MEDIUM
CVSS
4.3
EPSS
1.87%
Firefox

Original NVD Description

Mozilla Firefox before 3.6 Beta 3 does not properly handle overlong UTF-8 encoding, which makes it easier for remote attackers to bypass cross-site scripting (XSS) protection mechanisms via a crafted string, a different vulnerability than CVE-2010-1210.