What’s Vulnerable › Vulnerabilities

CVE-2021-20293

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-10 · updated 2026-06-17
• Weakness: CWE-79

Description

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 products

• OnCommand Insight: all versions
• Red Hat, Inc. resteasy: through 4.6.0

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1942819
• https://security.netapp.com/advisory/ntap-20210727-0005/
• https://bugzilla.redhat.com/show_bug.cgi?id=1942819
• https://security.netapp.com/advisory/ntap-20210727-0005/

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