Expression Language Injection in Apache Syncope
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.syncope:syncope-core | < 2.1.6 | 2.1.6 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-917- Platform
- Java / Kotlin (Maven)
- Package
org.apache.syncope:syncope-core- Disclosed
- 16.06.2021
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vjqw-r3ww-wj2w - CC BY 4.0
Vulnerability history: org.apache.syncope:syncope-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 11.2018 11.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 4
- Medium 2
Disclosures per year
- 2018: 4
- 2019: 0
- 2020: 0
- 2021: 2
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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Expression Language Injection in Apache Syncope this entry
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