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TI-2020-04766 Aliases CVE-2020-5846GHSA-wmc6-394v-6mrx

An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup…

Priority MEDIUM 41CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

Summary

An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0.30 via a "PUT /obs/obm7/file/upload" request with the base64-encoded pathname in the X-RSW-custom-encode-path HTTP header, and the content in the HTTP request body. It is possible to upload a file into any directory of the server. One can insert a JSP shell into the web server's directory and execute it. This leads to full system access as the configured user (e.g., Administrator) when starting from any authenticated session (e.g., a trial account). This is fixed in the 83/830122/cbs-*-hotfix-task26000 builds.

Why it matters now

EPSS 0.01399 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ahsay:cloud_backup_suite:8.3.0.30:*:*:*:*:*:*:*8.3.0.30VulnerableAhsay
  • cpe:2.3:a:ahsay:cloud_backup_suite:8.3.0.30:*:*:*:*:*:*:* Versions 8.3.0.30 Vulnerable ·Ahsay

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-5846
  2. 2026-10-03 Alias added: GHSA-wmc6-394v-6mrx

References

Exploit 1

  • TI-2026-67515 OS command injection in Ahsay AhsayCBS Replication Receiver KEVCVSS 4.0CRITICAL 10.0
  • TI-2026-67514 Improper authentication in Ahsay AhsayCBS API KEVCVSS 4.0MEDIUM 6.9
  • TI-2019-07579 An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup… CVSS 3.0HIGH 8.8
  • TI-2022-17231 Ahsay AhsayCBS 9.1.4.0 allows an authenticated system user to inject arbitrary Java JVM… CVSS 3.1HIGH 7.2
  • TI-2019-07578 An issue was discovered in Ahsay Cloud Backup Suite before 8.1.1.50. CVSS 3.0HIGH 7.5
  • TI-2019-07577 An issue was discovered in Ahsay Cloud Backup Suite before 8.1.1.50. CVSS 3.0HIGH 7.5
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences