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CVE-2018-20793: tecrail Responsive FileManager 9.13.4 allows remote attackers to write to an arbitrary file as a consequenc...

tecrail Responsive FileManager 9.13.4 allows remote attackers to write to an arbitrary file as a consequence of a paths[0] path traversal mitigation bypass, through the create_file action in execute.php.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects tecrail Responsive FileManager 9.13.4. A remote attacker could bypass path traversal protections and write to unintended files through the file-creation function. For an exposed web application, arbitrary file write can threaten site integrity and may support broader compromise depending on server permissions.

Executive priority

Treat this as a high-priority exposure review for internet-facing sites. The business concern is unauthorized file modification, which can damage public content integrity and may create a path to deeper compromise depending on deployment permissions.

Technical view

CVE-2018-20793 is a path traversal mitigation bypass in paths[0] handling for the create_file action in execute.php. The provided record says remote attackers can write to an arbitrary file. The source bundle does not provide CVSS, CWE, vendor advisory, or fixed-version details.

Likely exposure

Exposure is most likely where Responsive FileManager 9.13.4 is deployed inside a web application and its execute.php file-management endpoint is reachable by remote users. The provided affected-product metadata is sparse, so asset discovery should confirm the component and version directly.

Exploitation context

A public Exploit-DB reference exists, which raises practical risk. The bundle does not show CISA KEV listing or other evidence of active exploitation, so active exploitation should not be assumed from these sources alone.

Researcher notes

The strongest evidence is the CVE description and public Exploit-DB reference. Important details are missing from the bundle: CVSS, CWE mapping, affected CPEs, vendor fix information, and active exploitation evidence. Avoid claiming broader affected versions without additional vendor confirmation.

Mitigation direction

  • Inventory applications using Responsive FileManager and confirm whether version 9.13.4 is present.
  • Check tecrail Responsive FileManager guidance for fixed releases or supported mitigations.
  • Remove or isolate exposed Responsive FileManager 9.13.4 until remediation is confirmed.
  • Restrict file-manager access to trusted authenticated administrators only.
  • Review writable web directories for unexpected or recently modified files.

Validation and detection

  • Confirm whether execute.php from Responsive FileManager is reachable from untrusted networks.
  • Verify the deployed component version rather than relying only on package metadata.
  • Review web and application logs for unusual file-creation activity.
  • Inspect upload and managed-file directories for unexpected files or changed permissions.
  • Validate access controls around file-management actions in a safe test environment.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-20793 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.