Is CVE-2017-16858 actively exploited?

No active exploitation of CVE-2017-16858 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-16858 be exploited remotely?

Yes. CVE-2017-16858 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-16858?

CVE-2017-16858 has a CVSS score of 6.8 (MEDIUM).

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MEDIUM

CVE-2017-16858

CWE-863Published: January 31, 2018· Updated: Jun 17, 2026

6.8

CVSS v3.1

Official Description

The 'crowd-application' plugin module (notably used by the Google Apps plugin) in Atlassian Crowd from version 1.5.0 before version 3.1.2 allowed an attacker to impersonate a Crowd user in REST requests by being able to authenticate to a directory bound to an application using the feature. Given the following situation: the Crowd application is bound to directory 1 and has a user called admin and the Google Apps application is bound to directory 2, which also has a user called admin, it was possible to authenticate REST requests using the credentials of the user coming from directory 2 and impersonate the user from directory 1.

NVD Source

Technical Analysis

CVE-2017-16858 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 6.8.