CVE-2018-15886
CVE-2018-15886 is a high-severity vulnerability in Monstra with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: High (CVSS 3.x base score 7.2)
- CVSS v2: 6.5
- EPSS exploit prediction: 2% (74th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Monstra
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2018-15886?
- 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.
- How severe is CVE-2018-15886?
- CVE-2018-15886 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-15886 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-15886?
- CVE-2018-15886 affects Monstra. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-15886?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2018-15886 published?
- CVE-2018-15886 was published on 2018-09-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:monstra:monstra:3.0.4:*:*:*:*:*:*:*
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- CVE-2020-25414 — Critical (CVSS 9.8): A local file inclusion vulnerability was discovered in the captcha function in Monstra 3.0.4 which allows remote…
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- CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
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