Description
Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code via a crafted payload to the WEEKEND-PLANS function. NOTE: this is disputed because WEEKEND-PLANS is accessible only to actors who already have write access to the server, and they can more simply upload HTML files containing JavaScript.
References (3)
Core 3
Core References
Exploit, Third Party Advisory
https://github.com/Trinity-SYT-SECURITY/XSS_vuln_issue/blob/main/copyparty.md
Release Notes
https://github.com/9001/copyparty/releases/tag/v1.9.2
Scores
CVSS v3
7.8
EPSS
0.0003
EPSS Percentile
8.0%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Lab Environment
COMMUNITY
+1 more images
Community Lab
Details
CWE
CWE-79
Status
published
Products (1)
9001/copyparty
1.9.1
Published
Aug 29, 2025
Tracked Since
Feb 18, 2026