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CVE-2009-4127

25
FAUCET Score

CVE-2009-4127 describes an unspecified vulnerability in the Wikipedia Toolbar extension for Firefox, versions prior to 0.5.9.2. This flaw allows user-assisted remote attackers to execute arbitrary JavaScript with Chrome privileges, leveraging unspecified toolbar buttons and the eval function. With a CVSS score of 9.3, this vulnerability is critical, indicating a network-based attack with medium complexity that could lead to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.9.1CPE matchmatch criteria
cpe:2.3:a:wikipedia:wikipedia_toolbar:*:*:*:*:*:*:*:*
0.2CPE matchmatch criteria
cpe:2.3:a:wikipedia:wikipedia_toolbar:0.2:*:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:wikipedia:wikipedia_toolbar:0.4:*:*:*:*:*:*:*
0.4.1CPE matchmatch criteria
cpe:2.3:a:wikipedia:wikipedia_toolbar:0.4.1:*:*:*:*:*:*:*
0.4.2CPE matchmatch criteria
cpe:2.3:a:wikipedia:wikipedia_toolbar:0.4.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.96%
Probability of exploitation in next 30 days
EPSS Percentile
91.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0496 is in the 59th percentile among its peer group of 8,915 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

addons.mozilla.org / en-US/firefox/addons/versions/6401
secunia.com / advisories/37377
Vendor Advisory
securityfocus.com / bid/37038
vupen.com / english/advisories/2009/3268
Vendor Advisory