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CVE Record

CVE-2018-20791: tecrail Responsive FileManager 9.13.4 allows XSS via a media file upload with an XSS payload in the name, b...

tecrail Responsive FileManager 9.13.4 allows XSS via a media file upload with an XSS payload in the name, because of mishandling of the media_preview action.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2018-20791 is a cross-site scripting issue in tecrail Responsive FileManager 9.13.4. A maliciously named uploaded media file can cause script execution when the media preview behavior mishandles that name. Business risk depends on whether the file manager is deployed, reachable, and usable by untrusted or lower-trust users.

Executive priority

Treat this as a targeted web-application risk, not a confirmed emergency. Prioritize environments where the file manager is internet-facing, supports uploads, or is available to users outside a trusted admin group.

Technical view

The CVE description attributes the flaw to mishandling of the media_preview action in Responsive FileManager 9.13.4. The attack vector involves a media upload with script content embedded in the filename. The source bundle does not provide CVSS, CWE, patch details, or complete affected CPE data.

Likely exposure

Exposure is most likely in websites or CMS/admin integrations using tecrail Responsive FileManager 9.13.4, especially where media upload and preview features are available to non-admin users or exposed beyond trusted staff.

Exploitation context

The source bundle includes an Exploit-DB reference, so public exploit information exists. The CVE is not listed as KEV in the provided data, and the sources do not establish active exploitation in the wild.

Researcher notes

Evidence is limited but clear on the vulnerable behavior: filename handling during media preview can enable XSS. Missing CVSS and CPE data reduce precision. Do not assume broader affected versions or active exploitation without additional vendor or threat-intelligence confirmation.

Mitigation direction

  • Confirm whether Responsive FileManager 9.13.4 is present in any web application.
  • Check vendor or project guidance for patched versions or recommended remediation.
  • Restrict file-manager access to trusted, authenticated administrative users.
  • Avoid public exposure of media upload and preview functionality.
  • Monitor for suspicious media uploads and preview activity.

Validation and detection

  • Inventory webroots, CMS plugins, and bundled third-party file managers.
  • Verify the installed Responsive FileManager version where present.
  • Review whether untrusted users can upload or preview media files.
  • Check application logs for unusual media_preview requests or suspicious filenames.
  • Validate remediation in staging before production rollout.
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-2018-20791 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.