Low-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connectors and Resources check.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Improper Privilege Management vulnerability in Apache Syncope.
When:
the all-Java user workflow adapter is configured, or the Flowable user workflow adapter is configured, bearing a BPMN definition not requiring admin approval for user self registration of self update requests
the following scenario could happen. A REST API call can allow the user to grant themselves one or more of defined Roles, thus gaining their Entitlements and becoming in fact an administrator; the actual Entitlements gained depend on the Roles that are effectively defined on the specific Syncope deployment.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Apache Syncope.
An administrator with adequate entitlements can achieve execution of arbitrary SQL via stacked queries, leveraging unsanitized sort parameters.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements can achieve remote code execution through the connector subsystem by relying on scripted connectors' (REST and SQL) capability to run Groovy scripts.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by hardening the Groovy security sandbox.
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements can import arbitrary BPMN process definitions via the REST API and then start the process. When a BPMN process containing a Groovy scriptTask is imported and started, the Groovy script is executed directly on the server, with no sandbox.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by wrapping Flowable's Groovy scriptTasks with security sandbox.
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code bypassing the Groovy security sandbox.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by tightening the Groovy security sandbox.
Severity: moderate
Affected versions:
- Apache Syncope (org.apache.syncope.core:syncope-core-spring) 3.0.0-M0 through 3.0.16 - Apache Syncope (org.apache.syncope.core:syncope-core-spring) 4.0.0-M0 through 4.0.6 - Apache Syncope (org.apache.syncope.core:syncope-core-spring) 4.1.0-M0 through 4.1.1
Description:
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code bypassing the Groovy security sandbox.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by tightening the Groovy security sandbox.
Credit:
elin kai (finder) 无聊 (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-63071
Severity: moderate
Affected versions:
- Apache Syncope (org.apache.syncope.core.idm:syncope-core-idm-logic) 3.0.0-M0 through 3.0.16 - Apache Syncope (org.apache.syncope.core.idm:syncope-core-idm-logic) 4.0.0-M0 through 4.0.6 - Apache Syncope (org.apache.syncope.core.idm:syncope-core-idm-logic) 4.1.0-M0 through 4.1.1
Description:
Low-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connectors and Resources check.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Credit:
Adrián Leal Castaño (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-62418
Severity: important
Affected versions:
- Apache Syncope (org.apache.syncope.core:syncope-core-workflow-java) 3.0.0-M0 through 3.0.16 - Apache Syncope (org.apache.syncope.core:syncope-core-workflow-java) 4.0.0-M0 through 4.0.6 - Apache Syncope (org.apache.syncope.core:syncope-core-workflow-java) 4.1.0-M0 through 4.1.1
Description:
Improper Privilege Management vulnerability in Apache Syncope.
When:
the all-Java user workflow adapter is configured, or the Flowable user workflow adapter is configured, bearing a BPMN definition not requiring admin approval for user self registration of self update requests
the following scenario could happen. A REST API call can allow the user to grant themselves one or more of defined Roles, thus gaining their Entitlements and becoming in fact an administrator; the actual Entitlements gained depend on the Roles that are effectively defined on the specific Syncope deployment.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Credit:
Nic Jones (finder) elin kai (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-62183
Severity: important
Affected versions:
- Apache Syncope 3.0.0-M0 through 3.0.16 - Apache Syncope 4.0.0-M0 through 4.0.6 - Apache Syncope 4.1.0-M0 through 4.1.1
Description:
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Apache Syncope.
An administrator with adequate entitlements can achieve execution of arbitrary SQL via stacked queries, leveraging unsanitized sort parameters.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Credit:
Lennart Hostettler (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-57308
Severity: moderate
Affected versions:
- Apache Syncope 3.0.0-M0 through 3.0.16 - Apache Syncope 4.0.0-M0 through 4.0.6 - Apache Syncope 4.1.0-M0 through 4.1.1
Description:
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements can achieve remote code execution through the connector subsystem by relying on scripted connectors' (REST and SQL) capability to run Groovy scripts.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by hardening the Groovy security sandbox.
Credit:
follycat, Y0n3er (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-53421
Severity: moderate
Affected versions:
- Apache Syncope (org.apache.syncope.ext.flowable:syncope-ext-flowable-bpmn) 3.0.0-M0 through 3.0.16 - Apache Syncope (org.apache.syncope.ext.flowable:syncope-ext-flowable-bpmn) 4.0.0-M0 through 4.0.6 - Apache Syncope (org.apache.syncope.ext.flowable:syncope-ext-flowable-bpmn) 4.1.0-M0 through 4.1.1
Description:
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements can import arbitrary BPMN process definitions via the REST API and then start the process. When a BPMN process containing a Groovy scriptTask is imported and started, the Groovy script is executed directly on the server, with no sandbox.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by wrapping Flowable's Groovy scriptTasks with security sandbox.
Credit:
follycat, Y0n3er (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-53405
Exposure of Sensitive Information Through Data Queries vulnerability in Apache Syncope.
An administrator with adequate entitlements for Derived Schemas can create a malicious JEXL expression which allows any administrator with sufficient entitlements for User read to access User-related security-sensitive information.
This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0.
Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by further restricting the JEXL expression definition.
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.
An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code reaching a non-sandboxed execution path via the class static initializer.
This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0.
Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by forcing even the static initializer in Groovy code to run in a sandbox.
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.
Reflected XSS in Apache Syncope's Enduser Login page.
An attacker that tricks a legitimate user into clicking a malicious link and logging in to Syncope Enduser could steal that user's credentials.
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.
Severity: moderate
Affected versions:
- Apache Syncope (org.apache.syncope.client.idrepo:syncope-client-idrepo-console) 3.0 through 3.0.15 - Apache Syncope (org.apache.syncope.client.idrepo:syncope-client-idrepo-console) 4.0 through 4.0.3
Description:
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.
Credit:
follycat (finder) Y0n3er (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-23795
Severity: important
Affected versions:
- Apache Syncope (org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui) 3.0 through 3.0.15 - Apache Syncope (org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui) 4.0 through 4.0.3
Description:
Reflected XSS in Apache Syncope's Enduser Login page. An attacker that tricks a legitimate user into clicking a malicious link and logging in to Syncope Enduser could steal that user's credentials.
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.
Credit:
Kasper Karlsson (finder) Karin Taliga (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-23794
Severity: moderate
Affected versions:
- Apache Syncope 2.1 through 2.1.14 - Apache Syncope 3.0 through 3.0.8
Description:
When editing objects in the Syncope Console, incomplete HTML tags could be used to bypass HTML sanitization. This made it possible to inject stored XSS payloads which would trigger for other users during ordinary usage of the application. XSS payloads could also be injected in Syncope Enduser when editing “Personal Information” or “User Requests”: such payloads would trigger for administrators in Syncope Console, thus enabling session hijacking.
Users are recommended to upgrade to version 3.0.9, which fixes this issue.
Credit:
Kasper Karlsson, Omegapoint (finder) Pontus Hanssen, Omegapoint (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2024-45031
When editing a user, group or any object in the Syncope Console, HTML tags could be added to any text field and could lead to potential exploits. The same vulnerability was found in the Syncope Enduser, when editing "Personal Information" or "User Requests".
Users are recommended to upgrade to version 3.0.8, which fixes this issue.
Severity: moderate
Affected versions:
- Apache Syncope 2.1 through 2.1.14 - Apache Syncope 3.0 through 3.0.7
Description:
When editing a user, group or any object in the Syncope Console, HTML tags could be added to any text field and could lead to potential exploits. The same vulnerability was found in the Syncope Enduser, when editing “Personal Information” or “User Requests”.
Users are recommended to upgrade to version 3.0.8, which fixes this issue.
Credit:
Basalt IT-Security Team (finder)
References:
https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2024-38503
In Apache Syncope 2.1.X releases prior to 2.1.7, when the Flowable extension is enabled, an administrator with workflow entitlements can use Shell Service Tasks to perform malicious operations, including but not limited to file read, file write, and code execution.
Vulnerability to Server-Side Template Injection on Mail templates for Apache Syncope 2.0.X releases prior to 2.0.15, 2.1.X releases prior to 2.1.6, enabling attackers to inject arbitrary JEXL expressions, leading to Remote Code Execution (RCE) was discovered.
It was found that the Apache Syncope EndUser UI login page prio to 2.0.15 and 2.1.6 reflects the successMessage parameters. By this mean, a user accessing the Enduser UI could execute javascript code from URL query string.
A Server-Side Template Injection was identified in Apache Syncope prior to 2.1.6 enabling attackers to inject arbitrary Java EL expressions, leading to an unauthenticated Remote Code Execution (RCE) vulnerability. Apache Syncope uses Java Bean Validation (JSR 380) custom constraint validators. When building custom constraint violation error messages, they support different types of interpolation, including Java EL expressions. Therefore, if an attacker can inject arbitrary data in the error message template being passed, they will be able to run arbitrary Java code.
A malicious user with enough administration entitlements can inject html-like elements containing JavaScript statements into Connector names, Report names, AnyTypeClass keys and Policy descriptions. When another user with enough administration entitlements edits one of the Entities above via Admin Console, the injected JavaScript code is executed.
An administrator with workflow definition entitlements can use DTD to perform malicious operations, including but not limited to file read, file write, and code execution.
An administrator with user search entitlements in Apache Syncope 1.2.x before 1.2.11 and 2.0.x before 2.0.8 can recover sensitive security values using the fiql and orderby parameters.
An administrator with report and template entitlements in Apache Syncope 1.2.x before 1.2.11 and 2.0.x before 2.0.8 can use XSL Transformations (XSLT) to perform malicious operations, including but not limited to file read, file write, and code execution.
Apache Syncope 1.1.x before 1.1.8 uses weak random values to generate passwords, which makes it easier for remote attackers to guess the password via a brute force attack.