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Vulnerability record · CVE-2020-10688 · published 27 May 2021

CVE-2020-10688: Redhat fuse cross-site scripting vulnerability

Redhat · Fuse

A cross-site scripting (XSS) flaw was found in RESTEasy in versions before 3.11.1.Final and before 4.5.3.Final, where it did not properly handle URL encoding when the RESTEASY003870 exception occurs. An attacker could use this flaw to launch a reflected XSS attack.

6.1 CVSS 3.1 Medium EPSS 1.4% · top 28.7% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A cross-site scripting (XSS) flaw was found in RESTEasy in versions before 3.11.1.Final and before 4.5.3.Final, where it did not properly handle URL encoding when the RESTEASY003870 exception occurs. An attacker could use this flaw to launch a reflected XSS attack.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1814974 Issue TrackingPatchVendor Advisory
https://github.com/quarkusio/quarkus/issues/7248 ExploitIssue TrackingThird Party Advisory
https://issues.redhat.com/browse/RESTEASY-2519 Issue TrackingPermissions RequiredVendor Advisory
https://security.netapp.com/advisory/ntap-20210706-0008/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1814974 Issue TrackingPatchVendor Advisory
https://github.com/quarkusio/quarkus/issues/7248 ExploitIssue TrackingThird Party Advisory
https://issues.redhat.com/browse/RESTEASY-2519 Issue TrackingPermissions RequiredVendor Advisory
https://security.netapp.com/advisory/ntap-20210706-0008/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-10688), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.