Vulnerability in Monstra
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 file, a different vulnerability than CVE-2017-18048.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.135 (96.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.135 · newest: 0.135 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/monstra-cms/monstra/issues/429 (Exploit, Third Party Advisory, Issue Tracking)
- packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.ht… (Exploit, VDB Entry, Third Party Advisory)
- github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-Exploit (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-6383?
- CVE-2018-6383 is a high-severity vulnerability in Monstra, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.8/10. Published 2018-01-29.
- How severe is CVE-2018-6383?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2018-6383 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.