Apache Syncope: Console XXE on Keymaster parameters
Date: 2026-02
Affected: maven/org.apache.syncope.client.idrepo:syncope-client-idrepo-console, maven/org.apache.syncope.client.idrepo:syncope-client-idrepo-console
Attack vector: info-disclosure
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-23795
CWE: CWE-611
CVSS: 4.9 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N)

Improper Restriction of XML External Entity Reference vulnerability in Apache Syncope Console. An administrator with adequate entitlements to create or edit Keymaster parameters via Console can construct malicious XML text to launch an XXE attack, thereby causing sensitive data leakage occurs. This issue affects Apache Syncope: from 3.0 through 3.0.15, from 4.0 through 4.0.3. Users are recommended to upgrade to version 3.0.16 / 4.0.4, which fix this issue.


Mitigations:

Architectural layers (MAESTRO):