CVE-2011-2166 Missing authorization in n/a

What is CVE-2011-2166?

CVE-2011-2166 is a medium-severity missing authorization vulnerability in Dovecot Dovecot, published on 24 May 2011. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-16

Which versions are affected by CVE-2011-2166?

It affects 1 product.

Products include Dovecot Dovecot.

How do I fix CVE-2011-2166?

Upgrade to a fixed version.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2011-2166 being exploited?

There is no known exploitation of CVE-2011-2166 in the wild and no public exploit code.

Other vulnerabilities in Dovecot Dovecot

• CVE-2026-24031 Auth bypass in OX Dovecot Pro High 7.7
• CVE-2025-59032 Denial of service in OX Dovecot Pro High 7.5
• CVE-2026-27858 Denial of service in OX Dovecot Pro High 7.5
• CVE-2021-29157 Path traversal in n/a High 7.5
• CVE-2020-10957 Null dereference in n/a High 7.5

All Dovecot Dovecot vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2011-2166, GHSA-v9cm-xcfc-8942.