CVE-2005-0173: Squid

High severity, CVSS 7.5. EPSS: 31.9% chance of exploitation in the next 30 days.

squid_ldap_auth in Squid 2.5 and earlier allows remote authenticated users to bypass username-based Access Control Lists (ACLs) via a username with a space at the beginning or end, which is ignored by the LDAP server.

Affected products

• Squid Squid: version 2.0.patch1 only; version 2.0.patch2 only; version 2.0.pre1 only; version 2.0.release only; version 2.1.patch1 only; version 2.1.patch2 only; …

Published 2005-05-02. Last modified 2026-06-16.