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Lookup for vulnerable packages by Package URL.

Purlpkg:apache/httpd@2.4.51
Typeapache
Namespace
Namehttpd
Version2.4.51
Qualifiers
Subpath
Is_vulnerabletrue
Next_non_vulnerable_version2.4.54
Latest_non_vulnerable_version2.4.54
Affected_by_vulnerabilities
0
url VCID-cqjv-6m9n-mfeq
vulnerability_id VCID-cqjv-6m9n-mfeq
summary 
A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery).

This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-44224.json
reference_id
reference_type
scores
0
value 7.1
scoring_system cvssv3
scoring_elements CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-44224.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-44224
reference_id
reference_type
scores
0
value 0.1096
scoring_system epss
scoring_elements 0.93382
published_at 2026-04-01T12:55:00Z
1
value 0.1096
scoring_system epss
scoring_elements 0.93448
published_at 2026-04-24T12:55:00Z
2
value 0.1096
scoring_system epss
scoring_elements 0.93439
published_at 2026-04-18T12:55:00Z
3
value 0.1096
scoring_system epss
scoring_elements 0.93444
published_at 2026-04-21T12:55:00Z
4
value 0.1096
scoring_system epss
scoring_elements 0.9339
published_at 2026-04-02T12:55:00Z
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scoring_system epss
scoring_elements 0.93398
published_at 2026-04-07T12:55:00Z
6
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scoring_system epss
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published_at 2026-04-08T12:55:00Z
7
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scoring_system epss
scoring_elements 0.93409
published_at 2026-04-09T12:55:00Z
8
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scoring_system epss
scoring_elements 0.93415
published_at 2026-04-13T12:55:00Z
9
value 0.1096
scoring_system epss
scoring_elements 0.93414
published_at 2026-04-12T12:55:00Z
10
value 0.1096
scoring_system epss
scoring_elements 0.93434
published_at 2026-04-16T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-44224
2
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44224
reference_id
reference_type
scores
url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44224
3
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44790
reference_id
reference_type
scores
url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44790
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reference_url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
reference_id
reference_type
scores
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scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
5
reference_url https://bugzilla.redhat.com/show_bug.cgi?id=2034672
reference_id 2034672
reference_type
scores
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6
reference_url https://httpd.apache.org/security/json/CVE-2021-44224.json
reference_id CVE-2021-44224
reference_type
scores
0
value moderate
scoring_system apache_httpd
scoring_elements
url https://httpd.apache.org/security/json/CVE-2021-44224.json
7
reference_url https://security.gentoo.org/glsa/202208-20
reference_id GLSA-202208-20
reference_type
scores
url https://security.gentoo.org/glsa/202208-20
8
reference_url https://access.redhat.com/errata/RHSA-2022:1915
reference_id RHSA-2022:1915
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:1915
9
reference_url https://access.redhat.com/errata/RHSA-2022:6753
reference_id RHSA-2022:6753
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:6753
10
reference_url https://access.redhat.com/errata/RHSA-2022:7143
reference_id RHSA-2022:7143
reference_type
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11
reference_url https://access.redhat.com/errata/RHSA-2022:7144
reference_id RHSA-2022:7144
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:7144
12
reference_url https://usn.ubuntu.com/5212-1/
reference_id USN-5212-1
reference_type
scores
url https://usn.ubuntu.com/5212-1/
13
reference_url https://usn.ubuntu.com/5212-2/
reference_id USN-5212-2
reference_type
scores
url https://usn.ubuntu.com/5212-2/
fixed_packages
0
url pkg:apache/httpd@2.4.52
purl pkg:apache/httpd@2.4.52
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-g55m-t4s1-nfhv
1
vulnerability VCID-k4nk-qqxg-s7e6
2
vulnerability VCID-pnc8-bb23-vqh1
3
vulnerability VCID-xfm9-e5nr-wyat
resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.52
aliases CVE-2021-44224
risk_score 3.2
exploitability 0.5
weighted_severity 6.4
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-cqjv-6m9n-mfeq
1
url VCID-xwnu-h1xh-3bg6
vulnerability_id VCID-xwnu-h1xh-3bg6
summary 
A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts).
The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one.

This issue affects Apache HTTP Server 2.4.51 and earlier.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-44790.json
reference_id
reference_type
scores
0
value 9.8
scoring_system cvssv3
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-44790.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-44790
reference_id
reference_type
scores
0
value 0.86011
scoring_system epss
scoring_elements 0.99395
published_at 2026-04-24T12:55:00Z
1
value 0.86011
scoring_system epss
scoring_elements 0.99394
published_at 2026-04-21T12:55:00Z
2
value 0.86011
scoring_system epss
scoring_elements 0.99393
published_at 2026-04-13T12:55:00Z
3
value 0.87092
scoring_system epss
scoring_elements 0.99439
published_at 2026-04-07T12:55:00Z
4
value 0.87092
scoring_system epss
scoring_elements 0.99438
published_at 2026-04-01T12:55:00Z
5
value 0.87092
scoring_system epss
scoring_elements 0.99437
published_at 2026-04-02T12:55:00Z
6
value 0.87092
scoring_system epss
scoring_elements 0.99441
published_at 2026-04-09T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-44790
2
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44224
reference_id
reference_type
scores
url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44224
3
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44790
reference_id
reference_type
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4
reference_url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
reference_id
reference_type
scores
0
value 9.8
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
5
reference_url https://bugzilla.redhat.com/show_bug.cgi?id=2034674
reference_id 2034674
reference_type
scores
url https://bugzilla.redhat.com/show_bug.cgi?id=2034674
6
reference_url https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/51193.py
reference_id CVE-2021-44790
reference_type exploit
scores
url https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/51193.py
7
reference_url https://httpd.apache.org/security/json/CVE-2021-44790.json
reference_id CVE-2021-44790
reference_type
scores
0
value important
scoring_system apache_httpd
scoring_elements
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8
reference_url https://security.gentoo.org/glsa/202208-20
reference_id GLSA-202208-20
reference_type
scores
url https://security.gentoo.org/glsa/202208-20
9
reference_url https://access.redhat.com/errata/RHSA-2022:0143
reference_id RHSA-2022:0143
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:0143
10
reference_url https://access.redhat.com/errata/RHSA-2022:0258
reference_id RHSA-2022:0258
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:0258
11
reference_url https://access.redhat.com/errata/RHSA-2022:0288
reference_id RHSA-2022:0288
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:0288
12
reference_url https://access.redhat.com/errata/RHSA-2022:0303
reference_id RHSA-2022:0303
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:0303
13
reference_url https://access.redhat.com/errata/RHSA-2022:1136
reference_id RHSA-2022:1136
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:1136
14
reference_url https://access.redhat.com/errata/RHSA-2022:1137
reference_id RHSA-2022:1137
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:1137
15
reference_url https://access.redhat.com/errata/RHSA-2022:1138
reference_id RHSA-2022:1138
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:1138
16
reference_url https://access.redhat.com/errata/RHSA-2022:1139
reference_id RHSA-2022:1139
reference_type
scores
url https://access.redhat.com/errata/RHSA-2022:1139
17
reference_url https://usn.ubuntu.com/5212-1/
reference_id USN-5212-1
reference_type
scores
url https://usn.ubuntu.com/5212-1/
18
reference_url https://usn.ubuntu.com/5212-2/
reference_id USN-5212-2
reference_type
scores
url https://usn.ubuntu.com/5212-2/
fixed_packages
0
url pkg:apache/httpd@2.4.52
purl pkg:apache/httpd@2.4.52
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-g55m-t4s1-nfhv
1
vulnerability VCID-k4nk-qqxg-s7e6
2
vulnerability VCID-pnc8-bb23-vqh1
3
vulnerability VCID-xfm9-e5nr-wyat
resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.52
aliases CVE-2021-44790
risk_score 10.0
exploitability 2.0
weighted_severity 8.8
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-xwnu-h1xh-3bg6
Fixing_vulnerabilities
0
url VCID-qn74-neyt-jkg9
vulnerability_id VCID-qn74-neyt-jkg9
summary 
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient.  An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives.  

If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution.

This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42013.json
reference_id
reference_type
scores
0
value 8.1
scoring_system cvssv3
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42013.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-42013
reference_id
reference_type
scores
0
value 0.9441
scoring_system epss
scoring_elements 0.99977
published_at 2026-04-21T12:55:00Z
1
value 0.9441
scoring_system epss
scoring_elements 0.99978
published_at 2026-04-24T12:55:00Z
2
value 0.9441
scoring_system epss
scoring_elements 0.99979
published_at 2026-04-02T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-42013
2
reference_url http://www.openwall.com/lists/oss-security/2021/10/08/1
reference_id 1
reference_type
scores
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scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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value Act
scoring_system ssvc
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3
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reference_type
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4
reference_url http://www.openwall.com/lists/oss-security/2021/10/16/1
reference_id 1
reference_type
scores
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reference_url http://www.openwall.com/lists/oss-security/2021/10/08/2
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reference_type
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reference_id 2011900
reference_type
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reference_url http://www.openwall.com/lists/oss-security/2021/10/08/3
reference_id 3
reference_type
scores
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reference_url http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
reference_id Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
reference_type
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url http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
15
reference_url https://www.povilaika.com/apache-2-4-50-exploit/
reference_id apache-2-4-50-exploit
reference_type
scores
0
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scoring_system cvssv3.1
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1
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url https://www.povilaika.com/apache-2-4-50-exploit/
16
reference_url http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html
reference_id Apache-2.4.50-Remote-Code-Execution.html
reference_type
scores
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scoring_system cvssv3.1
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reference_url http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
reference_id Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
reference_type
scores
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