How severe is CVE-2008-5430?

CVE-2008-5430 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2008-5430 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5430?

CVE-2008-5430 affects Mozilla Thunderbird. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-5430?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-5430 published?

CVE-2008-5430 was published on 2008-12-13 and last updated on 2026-06-16.

CVE-2008-5430

CVE-2008-5430 is a medium-severity vulnerability in Mozilla Thunderbird with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Mozilla Thunderbird
Published: 2008-12-13
Last modified: 2026-06-16

Description

Mozilla Thunderbird 2.0.14 does not properly handle (1) multipart/mixed e-mail messages with many MIME parts and possibly (2) e-mail messages with many "Content-type: message/rfc822;" headers, which might allow remote attackers to cause a denial of service (stack consumption or other resource consumption) via a large e-mail message, a related issue to CVE-2006-1173.

Frequently asked questions

What is CVE-2008-5430?: Mozilla Thunderbird 2.0.14 does not properly handle (1) multipart/mixed e-mail messages with many MIME parts and possibly (2) e-mail messages with many "Content-type: message/rfc822;" headers, which might allow remote attackers to cause a denial of service (stack consumption or other resource consumption) via a large e-mail message, a related issue to CVE-2006-1173.
How severe is CVE-2008-5430?: CVE-2008-5430 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2008-5430 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5430?: CVE-2008-5430 affects Mozilla Thunderbird. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-5430?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-5430 published?: CVE-2008-5430 was published on 2008-12-13 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mozilla:thunderbird:2.0.0.14:*:*:*:*:*:*:*

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