CVE-2026-104102: medium-severity vulnerability in 9001 copyparty
copyparty FTP: upload outside defined volumes (limited path traversal)
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.3%
copyparty is a portable file server. Prior to 1.20.19, FTP upload path handling does not confine destinations to configured copyparty volumes. When FTP or FTPS is explicitly enabled, a low-privileged authenticated user can submit traversal paths during upload to create a new file outside configured volumes wherever the copyparty process has write permission. The attacker cannot read or overwrite files, the output name receives a randomized suffix, and copyparty does not execute the file; however, unrelated software on the same host could process the newly created file. This issue is fixed in version 1.20.19.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N
Affected products
9001 · copypartyRelated CVEs — 9001 copyparty
In the same product, most dangerous first.
CVE-2023-37474HIGHPath traversal in copypartyEPSS 44.9%CVE-2023-38501MEDIUMcopyparty vulnerable to reflected cross-site scripting via k304 parameterEPSS 9.2%CVE-2025-54589MEDIUMcopyparty Reflected XSS via Filter ParameterEPSS 2.4%CVE-2025-54796HIGHCopyparty is vulnerable to Regex Denial of Service (ReDoS) attacks through "Recent Uploads" pageEPSS 0.5%CVE-2025-54423MEDIUMcopyparty has a DOM-Based XSS vulnerability when displaying multimedia metadataEPSS 0.5%CVE-2025-27145LOWcopyparty renders unsanitized filenames as HTML when user uploads empty filesEPSS 0.5%