Is CVE-2018-15886 actively exploited?

No active exploitation of CVE-2018-15886 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-15886 be exploited remotely?

Yes. CVE-2018-15886 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-15886?

CVE-2018-15886 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2018-15886

HIGH

CVE-2018-15886

CWE-94Published: September 10, 2018· Updated: Jun 17, 2026

7.2

CVSS v3.1

Official Description

Monstra CMS 3.0.4 does not properly restrict modified Snippet content, as demonstrated by the admin/index.php?id=snippets&action=edit_snippet&filename=google-analytics URI, which allows attackers to execute arbitrary PHP code by placing this code after a <?php substring.

NVD Source

Technical Analysis

CVE-2018-15886 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.