How severe is CVE-2008-4103?

CVE-2008-4103 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-4103 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4103?

CVE-2008-4103 affects Joomla Com Mailto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-4103?

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

When was CVE-2008-4103 published?

CVE-2008-4103 was published on 2008-09-18 and last updated on 2026-06-16.

CVE-2008-4103

CVE-2008-4103 is a medium-severity vulnerability in Joomla Com Mailto with a CVSS 2.0 base score of 5.0. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Joomla Com Mailto
Published: 2008-09-18
Last modified: 2026-06-16

Description

The mailto (aka com_mailto) component in Joomla! 1.5 before 1.5.7 sends e-mail messages without validating the URL, which allows remote attackers to transmit spam.

Frequently asked questions

What is CVE-2008-4103?: The mailto (aka com_mailto) component in Joomla! 1.5 before 1.5.7 sends e-mail messages without validating the URL, which allows remote attackers to transmit spam.
How severe is CVE-2008-4103?: CVE-2008-4103 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-4103 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4103?: CVE-2008-4103 affects Joomla Com Mailto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-4103?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-4103 published?: CVE-2008-4103 was published on 2008-09-18 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:joomla:com_mailto:*:*:*:*:*:*:*:*

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