Apache Syncope Flaws Let Users Gain Admin Roles and Execute Remote Code

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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