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MEDIUM

CVE-2020-10688

CVSS v3

6.1

MEDIUM

EPSS Score

1.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • org.jboss.resteasy:resteasy-bomMavenfrom 4.0.0 · fixed in 4.5.3.Finaland 1 other package

Vendor advisories

  • CVE-2020-10688 Red Hat Product Security769 products fixed · 3 known affected

    RESTEasy: RESTEASY003870 exception in RESTEasy can lead to a reflected XSS attack

    resteasy.src as a component of Red Hat JBoss Fuse 6 · resteasy.src as a component of Red Hat OpenShift Application Runtimes · resteasy.src as a component of Red Hat support for Spring Boot

  • RHSA-2021:3140 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Fuse 7.9.0 release and security update

  • RHSA-2020:3806 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat support for Spring Boot 2.2.6.SP2 security update

  • RHSA-2020:2905 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat build of Thorntail 2.7.0 security and bug fix update

  • RHSA-2020:2511 Red Hat Product Security254 products fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.3.1 Security update

  • RHSA-2020:2512 Red Hat Product Security256 products fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.3.1 Security update

3 more advisories

Full record on 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.

Technical details

Published
2021-05-27

Frequently asked questions

What is CVE-2020-10688?

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.

Is CVE-2020-10688 actively exploited?

Active exploitation of CVE-2020-10688 has not been confirmed. Its EPSS score was 1.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-10688?

CVE-2020-10688 has a CVSS v3 base score of 6.1 (MEDIUM severity).

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