CVE-2008-4066

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2008-09-24 · updated 2026-06-16
Weakness: CWE-79

Description

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via HTML-escaped low surrogate characters that are ignored by the HTML parser, as demonstrated by a "jav&#56325ascript" sequence, aka "HTML escaped low surrogates bug."

Affected products

Mozilla Firefox: 2.0.0.14, 2.0.0.15, 2.0.0.16

References

http://blogs.technet.com/bluehat/archive/2008/08/14/targeted-fuzzing.aspx
http://download.novell.com/Download?buildid=WZXONb-tqBw~
http://jvn.jp/en/jp/JVN96950482/index.html
http://jvndb.jvn.jp/ja/contents/2011/JVNDB-2011-000058.html
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00005.html
http://secunia.com/advisories/31984
http://secunia.com/advisories/31985
http://secunia.com/advisories/32007
http://secunia.com/advisories/32010
http://secunia.com/advisories/32012
http://secunia.com/advisories/32025
http://secunia.com/advisories/32042

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