Is CVE-2018-6521 in the CISA KEV catalog?

No. CVE-2018-6521 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-6521?

CVE-2018-6521 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2018-6521?

CVE-2018-6521 has an EPSS score of 3.11% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-6521?

Upgrade simplesamlphp on debian 11 to 1.15.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2018-6521

CRITICALEPSS 86th pctl

9.8

CVSS v3

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.

How to fix

Remediation Available

simplesamlphpDebian

Fixed in:1.15.2-1CVE-2018-6521

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.11%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Exploit1

lists.debian.org

Vendor Advisory1

simplesamlphp.org

Third-Party Advisory1

debian.org

Embed a live status badge for CVE-2018-6521

Markdown

[![CVE-2018-6521](https://tridentstack.com/cve/badge/CVE-2018-6521.svg)](https://tridentstack.com/cve/CVE-2018-6521)

HTML

<a href="https://tridentstack.com/cve/CVE-2018-6521"><img src="https://tridentstack.com/cve/badge/CVE-2018-6521.svg" alt="CVE-2018-6521"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.