Security readout for executives and security teams
Plain-English summary
Monstra CMS 3.0.4 has an authenticated file upload weakness that can let a logged-in remote user place executable PHP-family code on the site. That can turn CMS access into server-side code execution. The bundle does not identify a CVSS score, affected vendor metadata, or a fixed version.
Executive priority
Prioritize if Monstra CMS 3.0.4 is present, especially on public-facing sites. Authenticated code execution can lead to website compromise and possible server takeover. If the product is not deployed, no action is needed beyond inventory confirmation.
Technical view
The CVE describes arbitrary PHP code upload and execution through Monstra CMS 3.0.4 file manager at admin/index.php?id=filesmanager. The stated bypass is extension filtering that blocks .php but not .php7. It is related to CVE-2017-18048. Public exploit reference exists, but the bundle does not prove active exploitation.
Likely exposure
Exposure is likely limited to organizations running Monstra CMS 3.0.4 where remote authenticated users can access the admin file manager. Internet-exposed admin panels, shared credentials, or broad CMS account access would materially increase risk.
Exploitation context
The source bundle includes an Exploit-DB reference, so public exploit information exists. CISA KEV is false in the bundle, and no cited source confirms active exploitation in the wild. The attacker needs authenticated access, based on the CVE description.
Researcher notes
Evidence is thin but specific: one CVE description and one public exploit reference. No CVSS, CWE, CPE, patch version, or vendor advisory is included. Avoid claiming unauthenticated access, confirmed exploitation, or a named fixed release without additional vendor evidence.
Mitigation direction
- Check Monstra CMS project or vendor guidance for a fixed release or workaround.
- Restrict admin file manager access to trusted, necessary users only.
- Limit admin interface exposure to trusted networks or VPN where feasible.
- Review and remove unnecessary CMS accounts and shared credentials.
- Inspect webroots and upload areas for unexpected PHP-family files.
Validation and detection
- Confirm whether any asset runs Monstra CMS 3.0.4.
- Identify whether the admin file manager is remotely reachable.
- Review which authenticated users can access file manager functions.
- Check web server logs for admin file manager upload activity.
- Look for unexpected executable PHP-family files in CMS-managed paths.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-13384 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.exploit-db.com/exploits/48479CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.