What’s Vulnerable › Vulnerabilities

CVE-2008-5510

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2008-12-17 · updated 2026-06-16

Description

The CSS parser in Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 ignores the '\0' escaped null character, which might allow remote attackers to bypass protection mechanisms such as sanitization routines.

Affected products

• Canonical Ubuntu Linux: 7.10, 8.04, 8.10
• Debian Linux: 4.0, 5.0
• Mozilla Firefox: from 2.0 before 2.0.0.19; from 3.0 before 3.0.5 — fixed in 2.0.0.19, 3.0.5
• Mozilla Seamonkey: from 1.0 before 1.1.14 — fixed in 1.1.14
• Mozilla Thunderbird: from 2.0 before 2.0.0.19 — fixed in 2.0.0.19

How to fix

Upgrade to a fixed version: Mozilla Firefox 2.0.0.19, 3.0.5; Mozilla Seamonkey 1.1.14; Mozilla Thunderbird 2.0.0.19. Check the vendor advisory for mitigations.

References

• http://secunia.com/advisories/33184
• http://secunia.com/advisories/33188
• http://secunia.com/advisories/33203
• http://secunia.com/advisories/33204
• http://secunia.com/advisories/33205
• http://secunia.com/advisories/33216
• http://secunia.com/advisories/33231
• http://secunia.com/advisories/33408
• http://secunia.com/advisories/33523
• http://secunia.com/advisories/34501
• http://secunia.com/advisories/35080
• http://sunsolve.sun.com/search/document.do?assetkey=1-26-256408-1

Get alerted when CVE-2008-5510 or the next vulnerability affects your stack