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Vulnerability details: VCID-9qdr-1v39-d7b7
Vulnerability ID VCID-9qdr-1v39-d7b7
Aliases CVE-2018-1283
Summary When mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per CGI specifications. The severity is set to Moderate because "SessionEnv on" is not a default nor common configuration, it should be considered more severe when this is the case though, because of the possible remote exploitation.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3 4.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1283.json
epss 0.02927 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03348 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
epss 0.03761 https://api.first.org/data/v1/epss?cve=CVE-2018-1283
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
apache_httpd moderate https://httpd.apache.org/security/json/CVE-2018-1283.json
archlinux Medium https://security.archlinux.org/AVG-664
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1283.json
https://api.first.org/data/v1/epss?cve=CVE-2018-1283
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15710
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15715
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1283
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1301
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1303
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1312
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1560395 https://bugzilla.redhat.com/show_bug.cgi?id=1560395
ASA-201804-4 https://security.archlinux.org/ASA-201804-4
AVG-664 https://security.archlinux.org/AVG-664
CVE-2018-1283 https://httpd.apache.org/security/json/CVE-2018-1283.json
RHSA-2019:0366 https://access.redhat.com/errata/RHSA-2019:0366
RHSA-2019:0367 https://access.redhat.com/errata/RHSA-2019:0367
RHSA-2020:3958 https://access.redhat.com/errata/RHSA-2020:3958
USN-3627-1 https://usn.ubuntu.com/3627-1/
USN-3627-2 https://usn.ubuntu.com/3627-2/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1283.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.86456
EPSS Score 0.02927
Published At April 26, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:36:21.559608+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2018-1283.json 38.0.0