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CVE-2022-4995 – Unauthenticated Remote Code Execution (Arbitrary File Upload) – Weaver E-cology vers

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Summary

CVE-2022-4995 is an unrestricted file upload vulnerability (CWE-434) in Weaver E-cology that allows a remote, unauthenticated attacker to upload arbitrary files, including JSP webshells, leading to remote code execution. It affects Weaver E-cology 9.0 in versions prior to 10.52 and is rated critical.

Technical details

  • Root cause: The /workrelate/plan/util/uploaderOperate.jsp endpoint lacks proper authentication and file-type validation, permitting arbitrary file submissions.
  • Trigger conditions: An attacker sends a multipart/form-data POST request to the vulnerable endpoint with arbitrary secId and plandetailid values to upload a file.
  • Attack vector: Network — remote and unauthenticated; no user interaction required.
  • Impact: Upload of JSP webshells resulting in arbitrary code execution under the privileges of the application server, giving full compromise of confidentiality, integrity, and availability.

Affected software

  • Weaver E-cology 9.0, all versions prior to 10.52.

Severity

  • CVSS v3.1 base score: 9.8 (Critical) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVSS v4.0 base score: 9.3 (Critical) — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Mitigation and recommended actions

  • Immediate: Upgrade Weaver E-cology to version 10.52 or later and apply the vendor’s security patches from the Weaver security download portal.
  • If no patch: Restrict internet access to the affected application, block or filter requests to /workrelate/plan/util/uploaderOperate.jsp at a WAF or reverse proxy, and monitor the upload directories for newly created JSP files.

References

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