CVE-2008-5510: n/a vulnerability

CVE-2008-5510: 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...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 10:56 UTC (UTC+00:00)

Security readout for executives and security teams

Older Mozilla browsers and mail clients mishandled an escaped null character in CSS. That could let hostile content slip past filtering or sanitization controls that expected CSS to be parsed differently. The record does not show confirmed active exploitation. Exposure is mainly legacy systems, old embedded browser stacks, or archived enterprise images still running vulnerable Mozilla versions or vendor-distributed packages from that era. Treat this as a legacy hygiene issue unless vulnerable Mozilla versions remain in production. Prioritize removal or patching where old browsers or mail clients process untrusted web or email content. Mitigation focus: Upgrade Firefox, Thunderbird, and SeaMonkey beyond the affected versions named in the CVE.; Apply relevant vendor packages from Mozilla, Red Hat, Ubuntu, Debian, Mandriva, or Sun guidance.; Remove unsupported legacy Mozilla clients from managed environments..

Prepared: Jun 28, 2026, 11:41 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 17, 2008, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:9662CVE reference · vdb-entry, signature
https://bugzilla.mozilla.org/show_bug.cgi?id=228856CVE reference · x_refsource_MISC
USN-690-1CVE reference · vendor-advisory, x_refsource_UBUNTU
mozilla-cssparser-security-bypass(47415)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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