Read the docs

bw-calendar-engine version <= bw-calendar-engine-3.12.0 contains a XML External Entity…

Priority MEDIUM 41CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub.

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.

Why it matters now

EPSS 0.0113 66th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—org.bedework.caleng:bw-calendar-engine (Maven)up to 3.12.2—No fix listedGHSA-xmvg-w4f9-99r7
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • org.bedework.caleng:bw-calendar-engine (Maven) Vendor— Affected up to 3.12.2 Fixed in — No fix listed GHSA-xmvg-w4f9-99r7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apereo:bw-calendar-engine:*:*:*:*:*:*:*:*up to 3.12.0VulnerableApereo
  • cpe:2.3:a:apereo:bw-calendar-engine:*:*:*:*:*:*:*:* Versions up to 3.12.0 Vulnerable ·Apereo

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-1000836
  2. 2026-10-03 Alias added: GHSA-xmvg-w4f9-99r7

References

Sources