Apache Syncope has released versions 4.1.24.1, 4.1.24.1.2, and 4.0.74.0.7 to address six security vulnerabilities affecting the 4.1, 4.0, and 3.0 release branches.
These vulnerabilities include a self-service privilege escalation bug, multiple post-authentication remote code execution (RCE) pathways, authenticated server-side request forgery (SSRF), and SQL injection issues.
Apache Syncope Flaws
CVE-2026-62183 affects deployments that utilize the all-Java user workflow adapter or the Flowable workflow adapter with BPMN definitions that do not require administrator approval for registration or self-update actions.
In these cases, an authenticated user may exploit a REST API call to add roles to their own account. The impact of this vulnerability varies based on the locally configured roles, but affected users could gain significant administrative privileges, including access to functions that could facilitate further compromise.
The advisory also addresses several code execution weaknesses related to Groovy. CVE-2026-63071 allows an administrator with implementation privileges to create a malicious Groovy class that can bypass the Groovy security sandbox.
CVE-2026-53421 enables remote code execution via scripted REST and SQL connectors that can execute Groovy scripts, while CVE-2026-53405 impacts Flowable-based deployments, where an entitled administrator can import and start a BPMN process that contains an unsandboxed Groovy script task.
Although the newly disclosed RCE flaws require administrative permissions to exploit, CVE-2026-62183 heightens their practical risk.
An attacker who first exploits the self-service privilege escalation flaw may gain the entitlements necessary to access dangerous administrative capabilities. Therefore, administrators should consider these vulnerabilities as part of a potential attack chain rather than viewing them in isolation.
CVE-2026-57308 is an SQL injection flaw in the Audit Events search feature. An administrator with adequate privileges can exploit unsanitized sorting parameters and stacked SQL queries to execute arbitrary SQL statements.
Additionally, CVE-2026-62418 allows a low-privileged authenticated user to perform server-side request forgery through connectors and resource checks, potentially permitting internal network probing or access to services reachable from the Syncope server.
Apache recommends that affected installations be upgraded to either Syncope version 4.1.24.1, 4.1.24.1.2, or 4.0.74.0.7. The vendor does not offer binary patches, so organizations that require source-level remediation should follow Apache’s build instructions or regenerate their Maven project from a published archetype.
Teams should also review role definitions, workflow approval requirements, REST API audit logs, connector configurations, and existing Groovy or BPMN implementations for any suspicious activity.
CVE Details
| CVE ID | Title / Short Description | Severity | Affected Versions |
|---|---|---|---|
| CVE-2026-63071 | RCE via Groovy Sandbox bypass | Moderate | 4.1.0-M0–4.1.1; 4.0.0-M0–4.0.6; 3.0.0-M0–3.0.16 |
| CVE-2026-62418 | Low-privileged authenticated SSRF in Connectors and Resources check | Moderate | 4.1.0-M0–4.1.1; 4.0.0-M0–4.0.6; 3.0.0-M0–3.0.16 |
| CVE-2026-62183 | User self-service privilege escalation | Important | 4.1.0-M0–4.1.1; 4.0.0-M0–4.0.6; 3.0.0-M0–3.0.16 |
| CVE-2026-57308 | SQL injection vulnerability in Audit Events search | Important | 4.1.0-M0–4.1.1; 4.0.0-M0–4.0.6; 3.0.0-M0–3.0.16 |
| CVE-2026-53421 | Remote Code Execution via Scripted Connector | Moderate | 4.1.0-M0–4.1.1; 4.0.0-M0–4.0.6; 3.0.0-M0–3.0.16 |
| CVE-2026-53405 | Remote Code Execution via Flowable BPMN Groovy ScriptTask | Moderate | 4.1.0-M0–4.1.1; 4.0.0-M0–4.0.6; 3.0.0-M0–3.0.16 |
| CVE-2026-42797 | JexlContextBuilder information disclosure | Moderate | 4.1–4.1.0; 4.0–4.0.5; 3.0–3.0.16 |
| CVE-2026-42782 | Post-auth RCE via Groovy static | Moderate | 4.1–4.1.0; 4.0–4.0.5; 3.0–3.0.16 |
| CVE-2026-23795 | Console XXE on Keymaster parameters | Important | 4.0–4.0.3; 3.0–3.0.15 |
| CVE-2026-23794 | Reflected XSS on Enduser Login | Important | 4.0–4.0.3; 3.0–3.0.15 |
| CVE-2025-65998 | Default AES key used for internal password encryption | Important | 4.0–4.0.2; 3.0–3.0.14; 2.1–2.1.14 |
| CVE-2025-57738 | Remote Code Execution by delegated administrators | Moderate | 4.0–4.0.1; 3.0–3.0.13; 2.1–2.1.14 |
| CVE-2024-45031 | Stored XSS in Console and Enduser | Moderate | 3.0–3.0.8; 2.1–2.1.14 |
| CVE-2024-38503 | HTML tags can be injected into Console or Enduser text fields | Moderate | 3.0–3.0.7; 2.1–2.1.14 |
| CVE-2020-11977 | Remote Code Execution via Flowable workflow definition | Low | 2.1.X releases prior to 2.1.7 |
| CVE-2020-1961 | Server-Side Template Injection on mail templates | Important | 2.0.X releases prior to 2.0.15; 2.1.X releases prior to 2.1.6 |
| CVE-2020-1959 | Multiple Remote Code Execution Vulnerabilities | Important | 2.1.X releases prior to 2.1.6 |
| CVE-2019-17557 | Enduser UI XSS | Medium | 2.0.X releases prior to 2.0.15; 2.1.X releases prior to 2.1.6 |
| CVE-2018-17186 | XXE on BPMN definitions | Medium | Releases prior to 2.0.11; releases prior to 2.1.2; unsupported 1.2.x may also be affected |
| CVE-2018-17184 | Stored XSS | Important | Releases prior to 2.0.11; releases prior to 2.1.2 |
| CVE-2018-1322 | Information disclosure via FIQL and ORDER BY sorting | Medium | Releases prior to 1.2.11; releases prior to 2.0.8; unsupported 1.0.x and 1.1.x may also be affected |
| CVE-2018-1321 | Remote code execution by administrators with report and template entitlements | Medium | Releases prior to 1.2.11; releases prior to 2.0.8; unsupported 1.0.x and 1.1.x may also be affected |
| CVE-2014-3503 | Insecure Random implementations used to generate passwords | Severity not listed on the advisory page | Releases 1.1.0–1.1.7 |
| CVE-2014-0111 | Remote code execution by an authenticated administrator | Severity not listed on the advisory page | Releases 1.0.0–1.0.8; 1.1.0–1.1.6 |
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