CVE-2018-1000836 json
XML External Entity (XXE) vulnerability in bw-calendar-engine
published 2018-12-20 7 y ago modified 2026-06-17 4 mo ago also GHSA-xmvg-w4f9-99r7 , EUVD-2018-0824
- cvss
- 9.0
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 9.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.bedework.caleng:bw-calendar-engine | <=3.12.2 |
no fix listed |
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
github.com
/Bedework/bw-calendar-engine/issues/3
web, third-party-advisory
-
0dd.zone
/2018/10/28/bw-calendar-engine-XXE-MitM/
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-1000836
advisory
-
0dd.zone
/2018/10/28/bw-calendar-engine-XXE-MitM
web
-
github.com
/Bedework/bw-calendar-engine
package
-
github.com
/advisories/GHSA-xmvg-w4f9-99r7
advisory
Sources
- CVE List CVE-2018-1000836
- GitHub Advisory GHSA-xmvg-w4f9-99r7
- NVD CVE-2018-1000836
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