How severe is CVE-2005-1807?

CVE-2005-1807 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-1807 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-1807?

CVE-2005-1807 affects Phpmailer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2005-1807?

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

When was CVE-2005-1807 published?

CVE-2005-1807 was published on 2005-05-28 and last updated on 2026-06-16.

CVE-2005-1807

CVE-2005-1807 is a medium-severity vulnerability in Phpmailer 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.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Phpmailer
Published: 2005-05-28
Last modified: 2026-06-16

Description

The Data function in class.smtp.php in PHPMailer 1.7.2 and earlier allows remote attackers to cause a denial of service (infinite loop leading to memory and CPU consumption) via a long header field.

Frequently asked questions

What is CVE-2005-1807?: The Data function in class.smtp.php in PHPMailer 1.7.2 and earlier allows remote attackers to cause a denial of service (infinite loop leading to memory and CPU consumption) via a long header field.
How severe is CVE-2005-1807?: CVE-2005-1807 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-1807 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-1807?: CVE-2005-1807 affects Phpmailer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2005-1807?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-1807 published?: CVE-2005-1807 was published on 2005-05-28 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:phpmailer:phpmailer:*:*:*:*:*:*:*:*

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