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Purlpkg:deb/debian/undertow@2.2.0-1?distro=sid
Typedeb
Namespacedebian
Nameundertow
Version2.2.0-1
Qualifiers
distro sid
Subpath
Is_vulnerablefalse
Next_non_vulnerable_version2.2.4-1
Latest_non_vulnerable_version2.3.20-1
Affected_by_vulnerabilities
Fixing_vulnerabilities
0
url VCID-73st-24ck-uydb
vulnerability_id VCID-73st-24ck-uydb
summary 
HTTP Request Smuggling in Undertow
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.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-10687.json
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3
scoring_elements CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-10687.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2020-10687
reference_id
reference_type
scores
0
value 0.00123
scoring_system epss
scoring_elements 0.3138
published_at 2026-04-21T12:55:00Z
1
value 0.00123
scoring_system epss
scoring_elements 0.3157
published_at 2026-04-04T12:55:00Z
2
value 0.00123
scoring_system epss
scoring_elements 0.31387
published_at 2026-04-07T12:55:00Z
3
value 0.00123
scoring_system epss
scoring_elements 0.3144
published_at 2026-04-08T12:55:00Z
4
value 0.00123
scoring_system epss
scoring_elements 0.31471
published_at 2026-04-09T12:55:00Z
5
value 0.00123
scoring_system epss
scoring_elements 0.31474
published_at 2026-04-11T12:55:00Z
6
value 0.00123
scoring_system epss
scoring_elements 0.31432
published_at 2026-04-12T12:55:00Z
7
value 0.00123
scoring_system epss
scoring_elements 0.31396
published_at 2026-04-13T12:55:00Z
8
value 0.00123
scoring_system epss
scoring_elements 0.31429
published_at 2026-04-16T12:55:00Z
9
value 0.00123
scoring_system epss
scoring_elements 0.31409
published_at 2026-04-18T12:55:00Z
10
value 0.00123
scoring_system epss
scoring_elements 0.3139
published_at 2026-04-01T12:55:00Z
11
value 0.00123
scoring_system epss
scoring_elements 0.31527
published_at 2026-04-02T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2020-10687
2
reference_url https://bugzilla.redhat.com/show_bug.cgi?id=1785049
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://bugzilla.redhat.com/show_bug.cgi?id=1785049
3
reference_url https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c@%3Cdev.cxf.apache.org%3E
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://lists.apache.org/thread.html/r6603513ea8afbf6857fd77ca5888ec8385d0af493baa4250e28c351c@%3Cdev.cxf.apache.org%3E
4
reference_url https://nvd.nist.gov/vuln/detail/CVE-2020-10687
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://nvd.nist.gov/vuln/detail/CVE-2020-10687
5
reference_url https://security.netapp.com/advisory/ntap-20220210-0015
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://security.netapp.com/advisory/ntap-20220210-0015
6
reference_url https://security.netapp.com/advisory/ntap-20220210-0015/
reference_id
reference_type
scores
url https://security.netapp.com/advisory/ntap-20220210-0015/
7
reference_url https://github.com/advisories/GHSA-p9w3-gwc2-cr49
reference_id GHSA-p9w3-gwc2-cr49
reference_type
scores
0
value MODERATE
scoring_system cvssv3.1_qr
scoring_elements
url https://github.com/advisories/GHSA-p9w3-gwc2-cr49
8
reference_url https://access.redhat.com/errata/RHSA-2020:3192
reference_id RHSA-2020:3192
reference_type
scores
url https://access.redhat.com/errata/RHSA-2020:3192
9
reference_url https://access.redhat.com/errata/RHSA-2021:0872
reference_id RHSA-2021:0872
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0872
10
reference_url https://access.redhat.com/errata/RHSA-2021:0873
reference_id RHSA-2021:0873
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0873
11
reference_url https://access.redhat.com/errata/RHSA-2021:0874
reference_id RHSA-2021:0874
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0874
12
reference_url https://access.redhat.com/errata/RHSA-2021:0885
reference_id RHSA-2021:0885
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0885
fixed_packages
0
url pkg:deb/debian/undertow@2.2.0-1?distro=sid
purl pkg:deb/debian/undertow@2.2.0-1?distro=sid
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/undertow@2.2.0-1%3Fdistro=sid
1
url pkg:deb/debian/undertow@2.3.20-1?distro=sid
purl pkg:deb/debian/undertow@2.3.20-1?distro=sid
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/undertow@2.3.20-1%3Fdistro=sid
aliases CVE-2020-10687, GHSA-p9w3-gwc2-cr49
risk_score 3.1
exploitability 0.5
weighted_severity 6.2
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-73st-24ck-uydb
1
url VCID-bpuw-kn4r-6kau
vulnerability_id VCID-bpuw-kn4r-6kau
summary 
HTTP request smuggling in Undertow
A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. 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. The highest threat from this vulnerability is to data confidentiality and integrity.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20220.json
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3
scoring_elements CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20220.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-20220
reference_id
reference_type
scores
0
value 0.00182
scoring_system epss
scoring_elements 0.39807
published_at 2026-04-21T12:55:00Z
1
value 0.00182
scoring_system epss
scoring_elements 0.3992
published_at 2026-04-04T12:55:00Z
2
value 0.00182
scoring_system epss
scoring_elements 0.39843
published_at 2026-04-07T12:55:00Z
3
value 0.00182
scoring_system epss
scoring_elements 0.39898
published_at 2026-04-08T12:55:00Z
4
value 0.00182
scoring_system epss
scoring_elements 0.39911
published_at 2026-04-09T12:55:00Z
5
value 0.00182
scoring_system epss
scoring_elements 0.39921
published_at 2026-04-11T12:55:00Z
6
value 0.00182
scoring_system epss
scoring_elements 0.39886
published_at 2026-04-12T12:55:00Z
7
value 0.00182
scoring_system epss
scoring_elements 0.39866
published_at 2026-04-13T12:55:00Z
8
value 0.00182
scoring_system epss
scoring_elements 0.39916
published_at 2026-04-16T12:55:00Z
9
value 0.00182
scoring_system epss
scoring_elements 0.39887
published_at 2026-04-18T12:55:00Z
10
value 0.00182
scoring_system epss
scoring_elements 0.39744
published_at 2026-04-01T12:55:00Z
11
value 0.00182
scoring_system epss
scoring_elements 0.39892
published_at 2026-04-02T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-20220
2
reference_url https://bugzilla.redhat.com/show_bug.cgi?id=1923133
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://bugzilla.redhat.com/show_bug.cgi?id=1923133
3
reference_url https://github.com/undertow-io/undertow/commit/9e797b2f99617fdad0471eaa88c711ee7f44605f
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/undertow-io/undertow/commit/9e797b2f99617fdad0471eaa88c711ee7f44605f
4
reference_url https://nvd.nist.gov/vuln/detail/CVE-2021-20220
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://nvd.nist.gov/vuln/detail/CVE-2021-20220
5
reference_url https://security.netapp.com/advisory/ntap-20220210-0013
reference_id
reference_type
scores
0
value 4.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://security.netapp.com/advisory/ntap-20220210-0013
6
reference_url https://security.netapp.com/advisory/ntap-20220210-0013/
reference_id
reference_type
scores
url https://security.netapp.com/advisory/ntap-20220210-0013/
7
reference_url https://github.com/advisories/GHSA-qjwc-v72v-fq6r
reference_id GHSA-qjwc-v72v-fq6r
reference_type
scores
0
value MODERATE
scoring_system cvssv3.1_qr
scoring_elements
url https://github.com/advisories/GHSA-qjwc-v72v-fq6r
8
reference_url https://access.redhat.com/errata/RHSA-2021:0872
reference_id RHSA-2021:0872
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0872
9
reference_url https://access.redhat.com/errata/RHSA-2021:0873
reference_id RHSA-2021:0873
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0873
10
reference_url https://access.redhat.com/errata/RHSA-2021:0874
reference_id RHSA-2021:0874
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0874
11
reference_url https://access.redhat.com/errata/RHSA-2021:0885
reference_id RHSA-2021:0885
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0885
12
reference_url https://access.redhat.com/errata/RHSA-2021:0974
reference_id RHSA-2021:0974
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:0974
13
reference_url https://access.redhat.com/errata/RHSA-2021:2210
reference_id RHSA-2021:2210
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:2210
14
reference_url https://access.redhat.com/errata/RHSA-2021:2755
reference_id RHSA-2021:2755
reference_type
scores
url https://access.redhat.com/errata/RHSA-2021:2755
fixed_packages
0
url pkg:deb/debian/undertow@2.2.0-1?distro=sid
purl pkg:deb/debian/undertow@2.2.0-1?distro=sid
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/undertow@2.2.0-1%3Fdistro=sid
1
url pkg:deb/debian/undertow@2.3.20-1?distro=sid
purl pkg:deb/debian/undertow@2.3.20-1?distro=sid
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/undertow@2.3.20-1%3Fdistro=sid
aliases CVE-2021-20220, GHSA-qjwc-v72v-fq6r
risk_score 3.1
exploitability 0.5
weighted_severity 6.2
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-bpuw-kn4r-6kau
Risk_scorenull
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:deb/debian/undertow@2.2.0-1%3Fdistro=sid