CVE-2020-10687

mediumpriority · track · 19EPSS 0.012 · 69 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.23% (69th) EPSS

CVSS 5.8 · medium

Is it mine?

20 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 2.5

v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · OSV

v3.14.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USCWE-444US

affected products (20)

Products and version ranges known to be affected.

Hitachi Network Attached Storageall versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:-
Hitachi Ops Centerall versionscert_bundDEcpe:/a:hitachi:ops_center:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat JBoss Enterprise Application Platform <7.1.9all versionscert_bundDE
Red Hat JBoss Enterprise Application Platform <7.3.2all versionscert_bundDE
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Red Hat JBoss Enterprise Application Platform< 7.1.8cert_bundDE
Red Hat JBoss Enterprise Application Platform< 7.1.9cert_bundDE
Red Hat JBoss Enterprise Application Platform< 7.3.2cert_bundDE
Red Hat JBoss Enterprise Application Platform< 7.3.6cert_bundDE
Splunk Splunk Enterprise≤ Add-on for JBoss <3.1.1cert_bundDE
n/a undertow≤ Undertow 2.2.0.Finalenisa_euvdEU
redhat jboss enterprise application platformall versionsnvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform= 7.2nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform= 7.3nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform= 7.4nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat single sign-onall versionsnvdUScpe:2.3:a:redhat:single_sign-on:*:*:*:*:*:*:*:*
redhat undertow< 2.2.0nvdUScpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
Maven io.undertow:undertow-core< 2.2.0.FinalosvUSpkg:maven/io.undertow/undertow-core

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-1912Red Hat JBoss Enterprise Application Platform: Mehrere SchwachstellenDeutsch2020-08-17csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat JBoss Enterprise Application Platform ausnutzen, um Code zur Ausführung zu bringen, Informationen offenzulegen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service zu verursachen.
WID-SEC-W-2023-1272Red Hat JBoss Enterprise Application Platform: Mehrere SchwachstellenDeutsch2021-03-16csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in Red Hat JBoss Enterprise Application Platform ausnutzen, um einen Denial-of-Service-Zustand auslösen, Informationen offenzulegen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen oder einen Cross-Site-Scripting-Angriff durchführen.
GHSA-p9w3-gwc2-cr49HTTP Request Smuggling in Undertow2021-04-30ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2020-09-23modified 2026-06-17

references (22)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan