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Vulnerability record · CVE-2018-6521 · published 2 February 2018

CVE-2018-6521: Simplesamlphp vulnerability

SSimplesamlphp · Simplesamlphp

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.

9.8 CVSS 3.0 Critical EPSS 3.1% · top 12.9%
9.8CVSS 3.0 base score, v2 7.5
3.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html ExploitMailing ListThird Party Advisory
https://simplesamlphp.org/security/201801-03 Vendor Advisory
https://www.debian.org/security/2018/dsa-4127 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html ExploitMailing ListThird Party Advisory
https://simplesamlphp.org/security/201801-03 Vendor Advisory
https://www.debian.org/security/2018/dsa-4127 Third Party Advisory

Track CVE-2018-6521 inside VULONE

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-6521), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.