CVE-2020-10687

Name: CVE-2020-10687
Creator: NVD / NIST
Published: 2020-09-23T13:15:15.157+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 1.15%

Last modified Jun 17, 2026

CVE-2020-10687 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

Description

A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

1.15%

62.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Undertow	< 2.2.0
Redhat	Jboss Enterprise Application Platform	All versions
Redhat	Single Sign-On	All versions
Redhat	Jboss Enterprise Application Platform	7.2
Redhat	Jboss Enterprise Application Platform	7.3
Redhat	Jboss Enterprise Application Platform	7.4

References

https://bugzilla.redhat.com/show_bug.cgi?id=1785049Issue Tracking, Vendor Advisory
https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c%40%3Cdev.cxf.apache.org%3E
https://security.netapp.com/advisory/ntap-20220210-0015/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1785049Issue Tracking, Vendor Advisory
https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c%40%3Cdev.cxf.apache.org%3E
https://security.netapp.com/advisory/ntap-20220210-0015/Third Party Advisory

Timeline

Published: Sep 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10687?

How severe is CVE-2020-10687?

CVE-2020-10687 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10687?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10687?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST