# CVE-2021-48013: Weaver E-cology path traversal in FileDownload

Source: https://junglewise.ai/threats/cve-2021-48013-weaver-e-cology-8-0-contains-a-path-traversal-vulnerability-that  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-22. Updated: 2026-10-22  
License: CC BY 4.0 with a link back

CVE-2021-48013 · Severity: high · CVSS 7.5 · Published 2026-10-22

Weaver E-cology is a workflow and document management system used by organizations to manage business processes. An unauthenticated attacker can read arbitrary files from the server by exploiting a path traversal flaw in the FileDownload endpoint, potentially exposing sensitive configuration files and application data.

Technologies: [Weaver E-cology](https://junglewise.ai/threats/technologies/e-cology). Vendors: [Weaver](https://junglewise.ai/threats/vendors/weaver).

## Quick answers

**Is CVE-2021-48013 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-48013 being exploited in the wild.

**How severe is CVE-2021-48013?** High severity, with a CVSS score of 7.5, published 22 October 2026.

**Which products and versions are affected?** Weaver E-cology 8.0.

**Is there a fix for CVE-2021-48013?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2021-48013 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2021-48013?** Check whether you run Weaver E-cology at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The /weaver/ln.FileDownload endpoint fails to properly validate the fpath parameter, allowing directory traversal sequences (../) to access files outside the intended directory. An unauthenticated remote attacker can craft GET requests with traversal patterns to retrieve sensitive files such as WEB-INF/web.xml. The vulnerability is network-accessible with no authentication or user interaction required.

## Affected products

- Weaver E-cology 8.0

## Timeline

- 2026-10-22: disclosed
- 2023-10-18: exploited: Shadowserver Foundation observed exploitation

## References

- [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](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)
- [https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/weaver/ecology/ecology-filedownload-directory-traversal.yaml](https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/weaver/ecology/ecology-filedownload-directory-traversal.yaml)

## Related threats

- [Weaver E-cology unauthenticated SQL injection in /api/doc/out/more/list](https://junglewise.ai/threats/cve-2025-71434-weaver-e-cology-8-0-9-0-and-10-0-prior-to-10-76-contains-an)
- [Weaver E-cology SQL injection in mobile plugin](https://junglewise.ai/threats/cve-2019-25776-weaver-e-cology-contains-an-unauthenticated-sql-injection)
- [Weaver E-cology SQL injection in HrmCareerApplyPerView.jsp](https://junglewise.ai/threats/cve-2022-50997-weaver-e-cology-sql-injection-in-hrmcareerapplyperview-jsp)
- [Weaver E-cology SQL injection in SignatureDownLoad servlet](https://junglewise.ai/threats/cve-2016-20097-weaver-e-cology-sql-injection-in-signaturedownload-servlet)
- [Weaver (Fanwei) E-cology 10.0 versions prior to 20260312 contain an unauthenticated remote code execution…](https://junglewise.ai/threats/cve-2026-22679-weaver-fanwei-e-cology-10-0-versions-prior-to-20260312-contain-an)