CVE-2020-8983Network attack vector

Unauthenticated code execution via arbitrary file write

Published May 7, 2020 · Updated Aug 4, 2024

Arbitrary file write in Citrix ShareFile StorageZones Controller allows remote attackers to execute code through its internet-facing service. Public records do not identify the request handler or explain how an untrusted path reaches the file-write operation. Exploitation is unauthenticated and depends on a storage zone created with 5.9.0, 5.8.0, 5.7.0, 5.6.0, 5.5.0, or earlier, regardless of the currently installed controller version.

CVSS severity7.5
High
EPSS probability4.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file write in Citrix ShareFile StorageZones Controller allows remote attackers to execute code through its internet-facing service. Public records do not identify the request handler or explain how an untrusted path reaches the file-write operation. Exploitation is unauthenticated and depends on a storage zone created with 5.9.0, 5.8.0, 5.7.0, 5.6.0, 5.5.0, or earlier, regardless of the currently installed controller version.

The record

CVE
CVE-2020-8983
Published
May 7, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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