Is CVE-2017-12870 in the CISA KEV catalog?

No. CVE-2017-12870 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-12870?

CVE-2017-12870 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2017-12870?

CVE-2017-12870 has an EPSS score of 0.88% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-12870?

Upgrade simplesamlphp on debian 11 to 1.14.15-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-12870

MEDIUM

5.9

CVSS v3

NVD

Description

SimpleSAMLphp 1.14.12 and earlier make it easier for man-in-the-middle attackers to obtain sensitive information by leveraging use of the aesEncrypt and aesDecrypt methods in the SimpleSAML/Utils/Crypto class to protect session identifiers in replies to non-HTTPS service providers.

CWE-200Information Exposure

How to fix

Remediation Available

simplesamlphpDebian

Fixed in:1.14.15-1CVE-2017-12870

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

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.88%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Patch1

simplesamlphp.org

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

Embed a live status badge for CVE-2017-12870

Markdown

[![CVE-2017-12870](https://tridentstack.com/cve/badge/CVE-2017-12870.svg)](https://tridentstack.com/cve/CVE-2017-12870)

HTML

<a href="https://tridentstack.com/cve/CVE-2017-12870"><img src="https://tridentstack.com/cve/badge/CVE-2017-12870.svg" alt="CVE-2017-12870"></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 2026-05-13.