CVE-2018-6521: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3.1% chance of exploitation in the next 30 days.

The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte characters. There might be a scenario in which this allows remote attackers to bypass intended access restrictions.

Affected products

• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Simplesamlphp Simplesamlphp: before 1.15.2 (fixed in 1.15.2)

Published 2018-02-02. Last modified 2026-06-17.