What is CVE-2018-1000836?

CVE-2018-1000836 is a critical-severity vulnerability in Apereo Bw-Calendar-Engine, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.0/10. Published 2018-12-20.

How severe is CVE-2018-1000836?

Critical severity. CVSS v3 base score is 9.0 out of 10.

XXE in Apereo Bw-Calendar-Engine

CVE-2018-1000836

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.

Vulnerability class: XXE (XML External Entity)

EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Apereo Bw-calendar-engine
N/a — versions n/a

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-1000836?: CVE-2018-1000836 is a critical-severity vulnerability in Apereo Bw-Calendar-Engine, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.0/10. Published 2018-12-20.
How severe is CVE-2018-1000836?: Critical severity. CVSS v3 base score is 9.0 out of 10.