CVE-2025-58753Network attack vector

Sibling-file disclosure via unchecked canonical path resolution

Published Sep 9, 2025 · Updated Sep 10, 2025

Missing authorization in 9001 copyparty before 1.19.8 allows remote authenticated users to read sibling files through single-file shares. The share VFS reused canonical path resolution that joined guessed names to the source directory without checking shr_files; fixed wrappers reject paths outside the shared-file allowlist. The shares feature must be enabled and a single-file share must exist; guessed names expose only sibling files, not subdirectories, filekeys, or dirkeys.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in 9001 copyparty before 1.19.8 allows remote authenticated users to read sibling files through single-file shares. The share VFS reused canonical path resolution that joined guessed names to the source directory without checking shr_files; fixed wrappers reject paths outside the shared-file allowlist. The shares feature must be enabled and a single-file share must exist; guessed names expose only sibling files, not subdirectories, filekeys, or dirkeys.

The record

CVE
CVE-2025-58753
Published
Sep 9, 2025
Updated
Sep 10, 2025
Vendor
copyparty
Product
copyparty
Classifications
CWE-862, CWE-552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.19.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

copyparty · copypartyversion=< 1.19.8

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-552Files or Directories Accessible to External Parties

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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