What’s Vulnerable › Vulnerabilities

CVE-2018-6521

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-02-02 · updated 2026-06-17

Description

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 Linux: 7.0, 8.0, 9.0
• simplesamlphp: before 1.15.2 — fixed in 1.15.2

How to fix

Upgrade to a fixed version: simplesamlphp 1.15.2. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html
• https://simplesamlphp.org/security/201801-03
• https://www.debian.org/security/2018/dsa-4127
• https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html
• https://simplesamlphp.org/security/201801-03
• https://www.debian.org/security/2018/dsa-4127

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