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CVE-2017-18048

Status: ModifiedHigh (8.8)—Exploit
Severity8.8High · CVSS 3.0
Exploitation probability63 %higher than 99% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableMetasploit module (reliable, widely available exploit)

Monstra CMS 3.0.4 allows users to upload arbitrary files, which leads to remote command execution on the server, for example because .php (lowercase) is blocked but .PHP (uppercase) is not.

CVSS

Base score
8.8
Version
3.0
Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
63 %
Percentile among all scored CVEs
99
Score date
10/30/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (1)

Monstra — Monstra

CWEs

References

Show 8 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2017-18048",
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  "metrics": {
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          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-434"
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    {
      "lang": "en",
      "value": "Monstra CMS 3.0.4 allows users to upload arbitrary files, which leads to remote command execution on the server, for example because .php (lowercase) is blocked but .PHP (uppercase) is not."
    },
    {
      "lang": "es",
      "value": "Monstra CMS 3.0.4 permite que los usuarios suban archivos arbitrarios, lo que conduce a la ejecución remota de comandos en el servidor, por ejemplo, debido a que .php (minúscula) está bloqueado pero .PHP (mayúscula) no lo está."
    }
  ],
  "lastModified": "2026-06-17T01:12:06.307",
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}