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Fencer Intel
medium 5.0

CVE-2010-0169 json

The CSSLoaderImpl::DoSheetComplete function in layout/style/nsCSSLoader.cpp in Mozilla Firefox 3.0.x before 3.0.18, 3.5.x before 3.5.8, and…

published 2010-03-25 16 y ago modified 2026-06-16 4 mo ago also EUVD-2010-0200

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

The CSSLoaderImpl::DoSheetComplete function in layout/style/nsCSSLoader.cpp in Mozilla Firefox 3.0.x before 3.0.18, 3.5.x before 3.5.8, and 3.6.x before 3.6.2; Thunderbird before 3.0.2; and SeaMonkey before 2.0.3 changes the case of certain strings in a stylesheet before adding this stylesheet to the XUL cache, which might allow remote attackers to modify the browser's font and other CSS attributes, and potentially disrupt rendering of a web page, by forcing the browser to perform this erroneous stylesheet caching.

Patch / fix

  • thunderbird RHEL 4 1.5.0.12-25.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.24-2.el5_4
  • seamonkey RHEL 3 1.0.9-0.50.el3
  • seamonkey RHEL 4 1.0.9-52.el4_8
  • seamonkey-nss RHEL 3 1.0.9-0.50.el3
  • seamonkey-chat RHEL 3 1.0.9-0.50.el3
  • seamonkey-chat RHEL 4 1.0.9-52.el4_8
  • seamonkey-mail RHEL 3 1.0.9-0.50.el3

red hat advisories RHSA-2010:0154RHSA-2010:0153RHSA-2010:0113RHSA-2010:0112

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-0169 updated cvss 4.3

firefox/thunderbird/seamonkey: browser chrome defacement via cached XUL stylesheets (MFSA 2010-14)

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.50.el3, seamonkey-nss 1.0.9-0.50.el3, seamonkey-chat 1.0.9-0.50.el3, seamonkey-mail 1.0.9-0.50.el3, seamonkey-nspr 1.0.9-0.50.el3, seamonkey-js-debugger 1.0.9-0.50.el3, +1 more
    fixed: vendor fix RHSA-2010:0113
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.18-1.el5_4, xulrunner 1.9.0.18-1.el5_4, xulrunner-devel-unstable 1.9.0.18-1.el5_4
    fixed: vendor fix RHSA-2010:0112
  • Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.50.el3, seamonkey-nss 1.0.9-0.50.el3, seamonkey-chat 1.0.9-0.50.el3, seamonkey-mail 1.0.9-0.50.el3, seamonkey-nspr 1.0.9-0.50.el3, seamonkey-js-debugger 1.0.9-0.50.el3, +1 more Red Hat Enterprise Linux AS version 4 firefox 3.0.18-1.el4, seamonkey 1.0.9-52.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-52.el4_8, seamonkey-mail 1.0.9-52.el4_8, seamonkey-js-debugger 1.0.9-52.el4_8, +1 more
    fixed: vendor fix RHSA-2010:0113
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.18-1.el5_4, xulrunner 1.9.0.18-1.el5_4, thunderbird 2.0.0.24-2.el5_4, xulrunner-devel-unstable 1.9.0.18-1.el5_4
    fixed: vendor fix RHSA-2010:0112
  • Red Hat Enterprise Linux Desktop version 4 firefox 3.0.18-1.el4, seamonkey 1.0.9-52.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-52.el4_8, seamonkey-mail 1.0.9-52.el4_8, seamonkey-js-debugger 1.0.9-52.el4_8, +1 more
    fixed: vendor fix RHSA-2010:0113
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.18-1.el5_4, xulrunner-devel-unstable 1.9.0.18-1.el5_4
    fixed: vendor fix RHSA-2010:0112
  • Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.50.el3, seamonkey-nss 1.0.9-0.50.el3, seamonkey-chat 1.0.9-0.50.el3, seamonkey-mail 1.0.9-0.50.el3, seamonkey-nspr 1.0.9-0.50.el3, seamonkey-js-debugger 1.0.9-0.50.el3, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.0.18-1.el4, seamonkey 1.0.9-52.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-52.el4_8, seamonkey-mail 1.0.9-52.el4_8, seamonkey-js-debugger 1.0.9-52.el4_8, +1 more
    fixed: vendor fix RHSA-2010:0113
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.24-2.el5_4
    fixed: vendor fix RHSA-2010:0153
show 1 more
  • Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.50.el3, seamonkey-nss 1.0.9-0.50.el3, seamonkey-chat 1.0.9-0.50.el3, seamonkey-mail 1.0.9-0.50.el3, seamonkey-nspr 1.0.9-0.50.el3, seamonkey-js-debugger 1.0.9-0.50.el3, +1 more Red Hat Enterprise Linux WS version 4 firefox 3.0.18-1.el4, seamonkey 1.0.9-52.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-52.el4_8, seamonkey-mail 1.0.9-52.el4_8, seamonkey-js-debugger 1.0.9-52.el4_8, +1 more
    fixed: vendor fix RHSA-2010:0113

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.