---
id: CVE-2021-48013
title: Weaver E-cology 8.0 Unauthenticated Path Traversal via ln.FileDownload
summary: >-
  Weaver E-cology 8.0 contains a path traversal vulnerability that allows
  unauthenticated attackers to read arbitrary files through the fpath parameter
  of the /weaver/ln.FileDownload endpoint. Attackers can send crafted GET
  requests with d…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-22
vendor: 'Weaver Network Co., Ltd.'
product: E-cology
affected:
  - E-cology 8.0
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T10:57:29.018Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2021-48013'
references:
  - url: >-
      https://github.com/PeiQi0/PeiQi-WIKI-Book/blob/main/docs/wiki/oa/%E6%B3%9B%E5%BE%AEOA/%E6%B3%9B%E5%BE%AEOA%20E-Weaver%20ln.FileDownload%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%AF%BB%E5%8F%96%E6%BC%8F%E6%B4%9E.md
    label: PeiQi Wiki GitHub Exploit
  - url: >-
      https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/weaver/ecology/ecology-filedownload-directory-traversal.yaml
    label: Nuclei Template
  - url: >-
      https://www.vulncheck.com/advisories/weaver-e-cology-8.0-unauthenticated-path-traversal-via-ln-filedownload
    label: >-
      VulnCheck Advisory: Weaver E-cology 8.0 Unauthenticated Path Traversal via
      ln.FileDownload
tags:
  - cve.org
ingestedAt: '2026-10-22T11:37:02.343Z'
---

## Overview

Weaver E-cology 8.0 contains a path traversal vulnerability that allows unauthenticated attackers to read arbitrary files through the fpath parameter of the /weaver/ln.FileDownload endpoint. Attackers can send crafted GET requests with directory traversal sequences in fpath to retrieve sensitive files such as WEB-INF/web.xml from the server. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-18.

## Affected

- `E-cology 8.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.