Exposure of class information in RESTEasy
A flaw was found in RESTEasy in all current versions of RESTEasy up to 4.6.0.Final. The endpoint class and method names are returned as part of the exception response when RESTEasy cannot convert one of the request URI path or query values to the matching JAX-RS resource method's parameter value. The highest threat from this vulnerability is to data confidentiality.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.jboss.resteasy:resteasy-core | >= 4.6.0, < 4.6.1, >= 4.0.0, < 4.5.10, >= 3.0.0, < 3.16.0 | 4.6.1, 4.5.10, 3.16.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-20289
- https://bugzilla.redhat.com/show_bug.cgi?id=1935927
- https://bugzilla.redhat.com/show_bug.cgi?id=1941544
- https://issues.redhat.com/browse/RESTEASY-2843
- https://security.netapp.com/advisory/ntap-20210528-0008
- https://www.oracle.com/security-alerts/cpuapr2022.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-209, CWE-668- Platform
- Java / Kotlin (Maven)
- Package
org.jboss.resteasy:resteasy-core- Disclosed
- 07.04.2021
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-244r-fcj3-ghjq - CC BY 4.0
Vulnerability history: org.jboss.resteasy:resteasy-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
- 4
- First → latest
- 04.2021 01.2025
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 3
Disclosures per year
- 2021: 3
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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Exposure of class information in RESTEasy this entry
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