Syncope
CVE-2026-23795
MEDIUM
GHSA-73f3-rqqf-2j54
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A02:2025 - Security Misconfiguration
ASVS 5.0
V13 - Configuration XML external entity prevention
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 4.9 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: High. User interaction: None. Exploitation requires authentication. |
| Exploit ScenarioDerived | An attacker (requires authentication) could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Syncope versions up to 3.0.15 is affected by improper restriction of xml external entity reference (CVSS 4.9).
RemediationAI
Update to version 3.0.16 or later. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in maven
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affects Syncope. 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.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
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.
Executive ViewAI
CVE-2026-23795 presents moderate security risk, a XML external entity vulnerability rated CVSS 4.9. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: implement egress filtering, block metadata endpoints.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
XML External Entity (XXE) attacks exploit XML parsers that process Document Type Definitions (DTDs) without proper restrictions.
Affected Products (CPE)CVE.org
An administrator with report and template entitlements in Apache Syncope 1.2.x before 1.2.11, 2.0.x before 2.0.8, and un
Missing authorization in Apache Syncope (3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2) le
Incorrect authorization in Apache Syncope allows a delegated administrator who holds only the ClientApp CREATE entitleme
Cross-realm authorization bypass in Apache Syncope allows an administrator who already holds delegated entitlements in o
Incorrect authorization in Apache Syncope (3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2)
Vulnerability to Server-Side Template Injection on Mail templates for Apache Syncope 2.0.X releases prior to 2.0.15, 2.1
A Server-Side Template Injection was identified in Apache Syncope prior to 2.1.6 enabling attackers to inject arbitrary
An administrator with user search entitlements in Apache Syncope 1.2.x before 1.2.11, 2.0.x before 2.0.8, and unsupporte
Apache Syncope can be configured to store the user password values in the internal database with AES encryption, though
Apache Syncope's pluggable extension mechanism lets a user holding administrator rights supply custom interface implemen
In Apache Syncope 2.1.X releases prior to 2.1.7, when the Flowable extension is enabled, an administrator with workflow
An administrator with workflow definition entitlements can use DTD to perform malicious operations, including but not li
Exploit-DB