What is CVE-2017-10873?

CVE-2017-10873 is a high-severity vulnerability in Open Source Solution Technology Corporation Openam, classified under Improper Authentication. CVSS score: 8.1/10. Published 2017-11-02.

How severe is CVE-2017-10873?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Open Source Solution Technology Corporation Openam

CVE-2017-10873

OpenAM (Open Source Edition) allows an attacker to bypass authentication and access unauthorized contents via unspecified vectors. Note that this vulnerability affects OpenAM (Open Source Edition) implementations configured as SAML 2.0IdP, and switches authentication methods based on AuthnContext requests sent from the service provider.

Vulnerability class: Broken Authentication

Published 2017-11-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.026 (84.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Open Source Solution Technology Corporation Openam — versions Open Source Edition
Osstech Openam

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.cs.themistruct.com/ (Third Party Advisory)
jvn.jp/en/jp/JVN79546124/ (VDB Entry, Third Party Advisory, third-party-advisory)
www.osstech.co.jp/support/am2017-2-1-en (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2017-10873?: CVE-2017-10873 is a high-severity vulnerability in Open Source Solution Technology Corporation Openam, classified under Improper Authentication. CVSS score: 8.1/10. Published 2017-11-02.
How severe is CVE-2017-10873?: High severity. CVSS v3 base score is 8.1 out of 10.