CVE-2018-18942

Exp

In baserCMS before 4.1.4, lib\Baser\Model\ThemeConfig.php allows remote attackers to execute arbitrary PHP code via the admin/theme_configs/form data[ThemeConfig][logo] parameter.

Published: 2018-11-05 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-18942 is rated High Exploit Risk (73.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.40%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.47% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-18942

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-18942

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.93% 2.40% +1.47%
2 2026-05-22 0.96% 0.93% -0.03%
3 2026-03-12 — 0.96% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-18942

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 5.9 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2018-18942

GitHub Security Advisory for CVE-2018-18942

GHSA-rjc2-x53r-6c9r · Severity: high · Ecosystem: composer — RCE in baserCMS before 4.1.4

Affected software / configurations for CVE-2018-18942

Vendor Product Version Raw CPE
basercms basercms < 4.1.4 cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*

References for CVE-2018-18942

URL Tags
http://sunu11.com/2018/10/31/baserCMS/ Exploit Third Party Advisory
https://basercms.net/release/4_1_4 Release Notes Vendor Advisory
https://github.com/baserproject/basercms/issues/959 Issue Tracking Third Party Advisory
cvelogic Threat Intelligence