CVE-2018-6383
Monstra CMS through 3.0.4 has an incomplete "forbidden types" list that excludes .php (and similar) file extensions but not the .pht or .phar extension, which allows remote authenticated Admins or Editors to execute arbitrary PHP code by uploading a…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 13.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
Monstra CMS through 3.0.4 has an incomplete "forbidden types" list that excludes .php (and similar) file extensions but not the .pht or .phar extension, which allows remote authenticated Admins or Editors to execute arbitrary PHP code by uploading a file, a different vulnerability than CVE-2017-18048.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 13.50% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 4 June 2021
- CISA KEV
- Not listed
- Weakness
- CWE-184
- Affected
- monstra/monstra
- Source
- cve@mitre.org
EPSS 13.5% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-ExploitExploit, Third Party Advisory
- https://github.com/monstra-cms/monstra/issues/429Exploit, Issue Tracking, Third Party Advisory
- http://packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-ExploitExploit, Third Party Advisory
- https://github.com/monstra-cms/monstra/issues/429Exploit, Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.