The Mozilla Updater in Mozilla Firefox before 21.0 on Windows does not properly maintain Mozilla Maintenance Service registry entries in ce…

published 2013-05-16 13y ago modified 2026-06-16 4mo ago also EUVD-2013-1700

cvss: 6.9; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

The Mozilla Updater in Mozilla Firefox before 21.0 on Windows does not properly maintain Mozilla Maintenance Service registry entries in certain situations involving upgrades from older Firefox versions, which allows local users to gain privileges by leveraging write access to a "trusted path."

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Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	6.9	AV:L/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-264 Permissions, Privileges, and Access Controls

References

mozilla.org /security/announce/2013/mfsa2013-45.html
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=854088
oval.cisecurity.org /repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17125
vdb-entry, signature

Sources

CVE List CVE-2013-1673
NVD CVE-2013-1673

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