CVE-2005-2270

Firefox before 1.0.5 and Mozilla before 1.7.9 does not properly clone base objects, which allows...

7.5 High

Firefox before 1.0.5 and Mozilla before 1.7.9 does not properly clone base objects, which allows remote attackers to execute arbitrary code by navigating the prototype chain to reach a privileged object.

Exploit likelihood

5.96%Down 6.3 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2005-2270
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

Record: CVE-2005-2270
Updated: 2026-11-02

EUVDEUVD-2005-2271 No score

Record: EUVD-2005-2271
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jgwp-9p3p-4h7j No score

Firefox before 1.0.5 and Mozilla before 1.7.9 does not properly clone base objects, which allows...

Record: GHSA-jgwp-9p3p-4h7j
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mozilla-firefox` Debian:3.1 From an advisory covering 11 CVEs	before 1.0.4-2sarge2, plus listed versions 1.0.4-21.0.4-2sarge1	1.0.4-2sarge2
`mozilla-firefox` Debian:3.1 From an advisory covering 11 CVEs	before 1.0.4-2sarge3, plus listed versions 1.0.4-21.0.4-2sarge11.0.4-2sarge2	1.0.4-2sarge3
`mozilla-thunderbird` Debian:3.1 From an advisory covering 9 CVEs	before 1.0.2-2.sarge1.0.6, plus listed versions 1.0.2-2	1.0.2-2.sarge1.0.6
`mozilla` Debian:3.1 From an advisory covering 10 CVEs	before 2:1.7.8-1sarge2, plus listed versions 2:1.7.8-12:1.7.8-1sarge1	2:1.7.8-1sarge2
`mozilla` Debian:4.0 From an advisory covering 10 CVEs	before 2:1.7.8-1sarge2, plus listed versions 19981008-0.12:1.0.0-0.woody.12:1.7.5-12:1.7.6-12:1.7.7-12:1.7.7-22:1.7.8-12:1.7.8-1sarge1	2:1.7.8-1sarge2
`mozilla-firefox` Debian:4.0 From an advisory covering 13 CVEs	before 1.0.4-2sarge3, plus listed versions 0.10.1+1.0PR-21.0+dfsg.1-61.0.1-11.0.1-21.0.1-3 Show 9 moreShow less 1.0.2-11.0.2-21.0.2-31.0.3-11.0.3-21.0.4-11.0.4-21.0.4-2sarge11.0.4-2sarge2	1.0.4-2sarge3
`firefox` Red Hat:enterprise_linux:4::as From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`firefox-debuginfo` Red Hat:enterprise_linux:4::as From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`firefox` Red Hat:enterprise_linux:4::desktop From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`firefox-debuginfo` Red Hat:enterprise_linux:4::desktop From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1

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Affected packages
Package	Affected	Fixed
`firefox` Red Hat:enterprise_linux:4::es From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`firefox-debuginfo` Red Hat:enterprise_linux:4::es From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`firefox` Red Hat:enterprise_linux:4::ws From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`firefox-debuginfo` Red Hat:enterprise_linux:4::ws From an advisory covering 13 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`devhelp` Red Hat:enterprise_linux:4::as From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-debuginfo` Red Hat:enterprise_linux:4::as From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-devel` Red Hat:enterprise_linux:4::as From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp` Red Hat:enterprise_linux:4::desktop From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-debuginfo` Red Hat:enterprise_linux:4::desktop From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-devel` Red Hat:enterprise_linux:4::desktop From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp` Red Hat:enterprise_linux:4::es From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-debuginfo` Red Hat:enterprise_linux:4::es From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-devel` Red Hat:enterprise_linux:4::es From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp` Red Hat:enterprise_linux:4::ws From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-debuginfo` Red Hat:enterprise_linux:4::ws From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`devhelp-devel` Red Hat:enterprise_linux:4::ws From an advisory covering 11 CVEs	before 0:0.9.2-2.4.6	0:0.9.2-2.4.6
`thunderbird` Red Hat:enterprise_linux:4::as From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird-debuginfo` Red Hat:enterprise_linux:4::as From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird` Red Hat:enterprise_linux:4::desktop From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird-debuginfo` Red Hat:enterprise_linux:4::desktop From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird` Red Hat:enterprise_linux:4::es From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird-debuginfo` Red Hat:enterprise_linux:4::es From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird` Red Hat:enterprise_linux:4::ws From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1
`thunderbird-debuginfo` Red Hat:enterprise_linux:4::ws From an advisory covering 9 CVEs	before 0:1.0.6-1.4.1	0:1.0.6-1.4.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2005-2270 is a high vulnerability (CVSS 7.5) in Mozilla Firefox, published July 13, 2005. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.96%, the 93rd percentile. No source names a fixed version.

References

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