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CVE-2005-2270

21
FAUCET Score

CVE-2005-2270 is a critical vulnerability affecting Firefox versions prior to 1.0.5 and Mozilla versions prior to 1.7.9, stemming from improper base object cloning. This flaw allows remote attackers to execute arbitrary code by manipulating the prototype chain to access privileged objects. With a CVSS score of 7.5, it presents a high risk due to its network-based attack vector, low attack complexity, and potential for partial confidentiality, integrity, and availability compromise. Despite its age and high FAUCET Risk Score of 93/100, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
0.8CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.8:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9:rc:*:*:*:*:*:*
0.9.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.1:*:*:*:*:*:*:*
0.9.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.96%
Probability of exploitation in next 30 days
EPSS Percentile
92.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0596 is in the 87th percentile among its peer group of 51,551 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, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Patch Available

Vendor Patches (4)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.0.6-1.4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.9.2-2.4.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.0.6-1.4.1
View patch

Vendor Advisories (1)

redhatCVE-2005-2270Important

security flaw

Jul 12, 2005

References

bugzilla.mozilla.org / show_bug.cgi
ExploitVendor Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitVendor Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitVendor Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitVendor Advisory
bugzilla.redhat.com / bugzilla/show_bug.cgi
secunia.com / advisories/16043
secunia.com / advisories/16059
secunia.com / advisories/19823
securitytracker.com / id
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100003
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11751
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A550
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A817
ciac.org / ciac/bulletins/p-252.shtml
debian.org / security/2005/dsa-810
kb.cert.org / vuls/id/652366
US Government Resource
mozilla.org / security/announce/mfsa2005-56.html
PatchVendor Advisory
novell.com / linux/security/advisories/2005_18_sr.html
novell.com / linux/security/advisories/2005_45_mozilla.html
novell.com / linux/security/advisories/2006_04_25.html
redhat.com / support/errata/RHSA-2005-586.html
redhat.com / support/errata/RHSA-2005-587.html
redhat.com / support/errata/RHSA-2005-601.html
securityfocus.com / bid/14242
vupen.com / english/advisories/2005/1075