Is CVE-2018-1000836 actively exploited?

No active exploitation of CVE-2018-1000836 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-1000836 be exploited remotely?

Yes. CVE-2018-1000836 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-1000836?

CVE-2018-1000836 has a CVSS score of 9.0 (CRITICAL).

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CRITICAL

CVE-2018-1000836

CWE-611Published: December 20, 2018· Updated: Jun 17, 2026

9.0

CVSS v3.1

Official Description

bw-calendar-engine version <= bw-calendar-engine-3.12.0 contains a XML External Entity (XXE) vulnerability in IscheduleClient XML Parser that can result in Disclosure of confidential data, denial of service, SSRF, port scanning. This attack appear to be exploitable via Man in the Middle or malicious server.

NVD Source

Technical Analysis

CVE-2018-1000836 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.0.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.