How severe is CVE-2011-1430?

CVE-2011-1430 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-1430 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1430?

CVE-2011-1430 primarily affects Ipswitch Imail. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1430?

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

When was CVE-2011-1430 published?

CVE-2011-1430 was published on 2011-03-16 and last updated on 2026-06-16.

CVE-2011-1430

CVE-2011-1430 is a medium-severity vulnerability in Ipswitch Imail with a CVSS 2.0 base score of 6.8. 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 6.8)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Ipswitch Imail
Published: 2011-03-16
Last modified: 2026-06-16

Description

The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

Frequently asked questions

What is CVE-2011-1430?: The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.
How severe is CVE-2011-1430?: CVE-2011-1430 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2011-1430 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1430?: CVE-2011-1430 primarily affects Ipswitch Imail. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1430?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1430 published?: CVE-2011-1430 was published on 2011-03-16 and last updated on 2026-06-16.

References

Affected products (46)

cpe:2.3:a:ipswitch:imail:*:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:5.0:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:5.0.5:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:5.0.6:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:5.0.7:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:5.0.8:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.00:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0.1:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0.4:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0.5:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.0.6:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.1:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.2:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.3:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.4:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:6.06:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.4:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.5:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.6:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.0.7:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.1:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:7.12:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.0.5:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.1:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.01:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.11:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.12:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.13:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:8.22:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:10:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:10.01:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:10.02:*:*:*:*:*:*:*
cpe:2.3:a:ipswitch:imail:11:*:*:*:*:*:*:*

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