How severe is CVE-2011-2166?

CVE-2011-2166 has a CVSS 2.0 base score of 6.5, rated medium severity.

Is CVE-2011-2166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2166?

CVE-2011-2166 primarily affects Dovecot. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2166?

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

When was CVE-2011-2166 published?

CVE-2011-2166 was published on 2011-05-24 and last updated on 2026-06-16.

CVE-2011-2166

CVE-2011-2166 is a medium-severity vulnerability in Dovecot 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-16.

Key facts

Severity: Medium (CVSS 2.0 base score 6.5)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Dovecot
Published: 2011-05-24
Last modified: 2026-06-16

Description

script-login in Dovecot 2.0.x before 2.0.13 does not follow the user and group configuration settings, which might allow remote authenticated users to bypass intended access restrictions by leveraging a script.

Frequently asked questions

What is CVE-2011-2166?: script-login in Dovecot 2.0.x before 2.0.13 does not follow the user and group configuration settings, which might allow remote authenticated users to bypass intended access restrictions by leveraging a script.
How severe is CVE-2011-2166?: CVE-2011-2166 has a CVSS 2.0 base score of 6.5, rated medium severity.
Is CVE-2011-2166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2166?: CVE-2011-2166 primarily affects Dovecot. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2166?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2166 published?: CVE-2011-2166 was published on 2011-05-24 and last updated on 2026-06-16.

References

Affected products (13)

cpe:2.3:a:dovecot:dovecot:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.10:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:dovecot:dovecot:2.0.12:*:*:*:*:*:*:*

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