Cross-Site Scripting
A reflected Cross-Site Scripting (XSS) flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final, where it did not properly handle URL encoding when calling @javax.ws.rs.PathParam without any @Produces MediaType. This flaw allows an attacker to launch a reflected XSS attack. The highest threat from this vulnerability is to data confidentiality and integrity.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.jboss.resteasy:resteasy-bom | <= 4.6.0.Final | no fix |
| Java / Kotlin (Maven) | org.jboss.resteasy:resteasy-core | <= 4.6.0.Final | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Java / Kotlin (Maven)
- Package
org.jboss.resteasy:resteasy-bom, org.jboss.resteasy:resteasy-core- Disclosed
- 15.06.2021
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-5h26-c766-g93v - CC BY 4.0
Vulnerability history: org.jboss.resteasy:resteasy-bom
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
- 5
- First → latest
- 06.2021 05.2022
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 2
Disclosures per year
- 2021: 3
- 2022: 2
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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