CVE-2023-38501

copyparty vulnerable to reflected cross-site scripting via k304 parameter

MEDIUM
6.1
CVSS Score
Published: July 25, 2023 at 09:06 PM UTC
Updated: June 17, 2026 at 06:10 AM UTC
2 products affected across 2 vendorsCopypartyCopyparty

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Severity
MEDIUM6.1
Exploit prediction
EPSS 9%
SSVC
PoC

Description

copyparty is file server software. Prior to version 1.8.7, the application contains a reflected cross-site scripting via URL-parameter `?k304=...` and `?setck=...`. The worst-case outcome of this is being able to move or delete existing files on the server, or upload new files, using the account of the person who clicks the malicious link. It is recommended to change the passwords of one's copyparty accounts, unless one have inspected one's logs and found no trace of attacks. Version 1.8.7 contains a patch for the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.8.7
Affected range stops below 1.8.7, so it looks safe — our inference, not a vendor statement
v < 1.8.7
Affected range stops below 1.8.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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