CVE-2009-2654

Firefox vulnerability

CVSS

5.8

EPSS

4.7%

EPSS pct

91th

Exploited

No known

Mozilla Firefox before 3.0.13, and 3.5.x before 3.5.2, allows remote attackers to spoof the address bar, and possibly conduct phishing attacks, via a crafted web page that calls window.open with an invalid character in the URL, makes document.write calls to the resulting object, and then calls the stop method during the loading of the error page.

Affected vendor

Mozilla

Affected product

Firefox

CVSS vector

AV:N/AC:M/Au:N/C:N/I:P/A:P

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2009-08-03

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to integrity, partial impact to availability.

Its EPSS score of 4.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2009-2654

Confirm whether Mozilla Firefox is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-2654.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-2654

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-2654 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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