What is CVE-2017-12869?

CVE-2017-12869 is a high-severity vulnerability in Simplesamlphp, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-09-01.

How severe is CVE-2017-12869?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Simplesamlphp

CVE-2017-12869

The multiauth module in SimpleSAMLphp 1.14.13 and earlier allows remote attackers to bypass authentication context restrictions and use an authentication source defined in config/authsources.php via vectors related to improper validation of user input.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.024 (83.3th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.024 · change: +0.000

Affected products

Simplesamlphp
Debian Linux — versions 7.0, 8.0, 9.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

simplesamlphp.org/security/201704-02 (Patch, Vendor Advisory)
lists.debian.org/debian-lts-announce/2017/12/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
www.debian.org/security/2018/dsa-4127 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2017-12869?: CVE-2017-12869 is a high-severity vulnerability in Simplesamlphp, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-09-01.
How severe is CVE-2017-12869?: High severity. CVSS v3 base score is 7.5 out of 10.