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CVE-2018-18942

24
FAUCET Score

CVE-2018-18942 is a critical vulnerability affecting baserCMS versions prior to 4.1.4, specifically within the lib\Baser\Model\ThemeConfig.php file. This flaw allows authenticated remote attackers to execute arbitrary PHP code by manipulating the data[ThemeConfig][logo] parameter during theme configuration. With a CVSS v3 score of 7.2 (High), it presents a significant risk, as exploitation requires high privileges but has no user interaction and can lead to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.1.4CPE matchmatch criteria
cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.2HIGH

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.40%
Probability of exploitation in next 30 days
EPSS Percentile
82.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0240 is in the 79th percentile among its peer group of 5,537 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: baserproject/basercmsFixed in: 4.1.4

Vendor Advisories (1)

composerGHSA-rjc2-x53r-6c9rhigh

RCE in baserCMS before 4.1.4

May 13, 2022

References

basercms.net / release/4_1_4
Release NotesVendor Advisory
github.com / baserproject/basercms/issues/959
Issue TrackingThird Party Advisory
sunu11.com / 2018/10/31/baserCMS
ExploitThird Party Advisory