How severe is CVE-2006-5313?

CVE-2006-5313 has a CVSS 2.0 base score of 6.5, rated medium severity.

Is CVE-2006-5313 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-5313?

CVE-2006-5313 primarily affects Hastymail. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-5313?

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

When was CVE-2006-5313 published?

CVE-2006-5313 was published on 2006-10-17 and last updated on 2026-06-16.

CVE-2006-5313

CVE-2006-5313 is a medium-severity vulnerability in Hastymail with a CVSS 2.0 base score of 6.5. 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 6.5)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Hastymail
Published: 2006-10-17
Last modified: 2026-06-16

Description

Hastymail 1.5 and earlier before 20061008 allows remote authenticated users to send arbitrary SMTP commands by placing them after a CRLF.CRLF sequence in the smtp_message parameter. NOTE: this crosses privilege boundaries if the SMTP server configuration prevents a user from establishing a direct SMTP session. NOTE: this is a different type of issue than CVE-2006-5262.

Frequently asked questions

What is CVE-2006-5313?: Hastymail 1.5 and earlier before 20061008 allows remote authenticated users to send arbitrary SMTP commands by placing them after a CRLF.CRLF sequence in the smtp_message parameter. NOTE: this crosses privilege boundaries if the SMTP server configuration prevents a user from establishing a direct SMTP session. NOTE: this is a different type of issue than CVE-2006-5262.
How severe is CVE-2006-5313?: CVE-2006-5313 has a CVSS 2.0 base score of 6.5, rated medium severity.
Is CVE-2006-5313 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-5313?: CVE-2006-5313 primarily affects Hastymail. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-5313?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-5313 published?: CVE-2006-5313 was published on 2006-10-17 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:hastymail:hastymail:*:*:*:*:*:*:*:*
cpe:2.3:a:hastymail:hastymail:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:hastymail:hastymail:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:hastymail:hastymail:1.1:*:*:*:*:*:*:*
cpe:2.3:a:hastymail:hastymail:1.2:*:*:*:*:*:*:*

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