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CVE-2009-3012

14
FAUCET Score

CVE-2009-3012 describes a cross-site scripting (XSS) vulnerability in Mozilla Firefox versions 3.0.13 and earlier, 3.5, 3.6 a1 pre, and 3.7 a1 pre. This flaw allows remote attackers to execute arbitrary JavaScript by injecting data: URIs containing malicious scripts into Location headers of HTTP responses, or by users directly entering such URIs. The vulnerability has a CVSS score of 4.3 (medium severity), indicating a network-based attack with medium complexity and a partial impact on integrity, as the JavaScript executes outside the context of the HTTP site. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.13CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.0:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.0:alpha:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.0:beta2:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.0:beta5:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.83%
Probability of exploitation in next 30 days
EPSS Percentile
53.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0083 is in the 11th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

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.

Media 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.

Remediation

Vendor Advisories (1)

redhatCVE-2009-3012Moderate

firefox: xss due to data: URIs in Location header

Jul 14, 2009

References

websecurity.com.ua / 3323
Exploit
websecurity.com.ua / 3386
Exploit