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CVE-2009-4101

24
FAUCET Score

CVE-2009-4101 describes a critical vulnerability in the infoRSS 1.1.4.2 and earlier Firefox extension, allowing remote attackers to execute arbitrary commands and conduct cross-domain scripting attacks. This is due to the extension performing operations with chrome privileges, exploitable via the description tag of an RSS feed. With a CVSS score of 9.3, this vulnerability has a high severity, indicating a network-based attack with medium complexity that could lead to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, no publicly available exploit code in Metasploit or ExploitDB, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.4.2CPE matchmatch criteria
cpe:2.3:a:didier_ernotte:inforss:*:*:*:*:*:*:*:*
0.5CPE matchmatch criteria
cpe:2.3:a:didier_ernotte:inforss:0.5:*:*:*:*:*:*:*
0.7.7CPE matchmatch criteria
cpe:2.3:a:didier_ernotte:inforss:0.7.7:*:*:*:*:*:*:*
0.8.4CPE matchmatch criteria
cpe:2.3:a:didier_ernotte:inforss:0.8.4:*:*:*:*:*:*:*
0.8.7CPE matchmatch criteria
cpe:2.3:a:didier_ernotte:inforss:0.8.7:*:*:*:*:*:*:*

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
3.55%
Probability of exploitation in next 30 days
EPSS Percentile
88.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0355 is in the 48th percentile among its peer group of 8,920 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, 0.1 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/361
secunia.com / advisories/37467
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/54370
vupen.com / english/advisories/2009/3323
Vendor Advisory