Is CVE-2017-18122 in the CISA KEV catalog?

No. CVE-2017-18122 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-18122?

CVE-2017-18122 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2017-18122?

CVE-2017-18122 has an EPSS score of 1.12% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-18122?

Upgrade simplesamlphp on debian 11 to 1.15.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-18122

HIGH

8.1

CVSS v3

NVD

Description

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

CWE-347

How to fix

Remediation Available

simplesamlphpDebian

Fixed in:1.15.0-1CVE-2017-18122

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.12%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Patch1

simplesamlphp.org

Third-Party Advisory2

Related Vulnerabilities

Other CWE-347 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-16042	Medium	6.5	82%	-	-
CVE-2025-59718	Critical	9.8	66%	KEV	Fix
CVE-2025-25292	Critical	9.8	64%	-	Fix
CVE-2021-22160	Critical	9.8	53%	-	Fix
CVE-2013-3900	Medium	5.5	45%	KEV	-
CVE-2018-0114	High	7.5	43%	-	Fix

Embed a live status badge for CVE-2017-18122

Markdown

[![CVE-2017-18122](https://tridentstack.com/cve/badge/CVE-2017-18122.svg)](https://tridentstack.com/cve/CVE-2017-18122)

HTML

<a href="https://tridentstack.com/cve/CVE-2017-18122"><img src="https://tridentstack.com/cve/badge/CVE-2017-18122.svg" alt="CVE-2017-18122"></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.