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Vulnerability details: VCID-gsg3-fdmu-vqag
Vulnerability ID VCID-gsg3-fdmu-vqag
Aliases CVE-2018-18942
GHSA-rjc2-x53r-6c9r
Summary Improper Input Validation baserCMS allows remote attackers to execute arbitrary PHP code via the `admin/theme_configs/form`.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00928 https://api.first.org/data/v1/epss?cve=CVE-2018-18942
epss 0.00928 https://api.first.org/data/v1/epss?cve=CVE-2018-18942
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-rjc2-x53r-6c9r
cvssv3.1 7.2 https://github.com/baserproject/basercms/issues/959
generic_textual HIGH https://github.com/baserproject/basercms/issues/959
cvssv3.1 7.2 https://nvd.nist.gov/vuln/detail/CVE-2018-18942
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-18942
cvssv3.1 7.2 https://web.archive.org/web/20200130073341/https://basercms.net/release/4_1_4
generic_textual HIGH https://web.archive.org/web/20200130073341/https://basercms.net/release/4_1_4
cvssv3.1 7.2 https://web.archive.org/web/20211209034642/http://sunu11.com/2018/10/31/baserCMS
generic_textual HIGH https://web.archive.org/web/20211209034642/http://sunu11.com/2018/10/31/baserCMS
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-18942
https://basercms.net/release/4_1_4
https://github.com/baserproject/basercms/issues/959
https://web.archive.org/web/20200130073341/https://basercms.net/release/4_1_4
https://web.archive.org/web/20211209034642/http://sunu11.com/2018/10/31/baserCMS
https://web.archive.org/web/20211209034642/http://sunu11.com/2018/10/31/baserCMS/
CVE-2018-18942 https://nvd.nist.gov/vuln/detail/CVE-2018-18942
GHSA-rjc2-x53r-6c9r https://github.com/advisories/GHSA-rjc2-x53r-6c9r
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/baserproject/basercms/issues/959
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:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-18942
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:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://web.archive.org/web/20200130073341/https://basercms.net/release/4_1_4
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:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://web.archive.org/web/20211209034642/http://sunu11.com/2018/10/31/baserCMS
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 0.76457
EPSS Score 0.00928
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:38:33.919034+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/baserproject/basercms/CVE-2018-18942.yml 38.6.0