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VulnerabilityPublished Updated

CVE-2023-41471: copyparty · Cross-site Scripting

Affects copypartySource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High : upgrade to 1.9.2 soon.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.9.2
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Aug 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade 9001/copyparty to 1.9.2.

Affected software

ProductAffectedFixed in
GitHub9001/copypartypkg:github/9001/copypartyOther threatsAffected
  • <1.9.2
Fixed in
  • 1.9.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

European organizations should ensure that copyparty installations are updated to version 1.9.2 or later, where this vulnerability is addressed. If you cannot patch yet, strict access controls should be enforced to limit write permissions only to fully trusted users. Implement monitoring and logging of user actions on the server to detect suspicious activities related to the WEEKEND-PLANS function or file uploads. Employ web application firewalls (WAFs) with rules to detect and block XSS payloads targeting copyparty endpoints. Educate users with write access about the risks of uploading malicious content and enforce content validation or sanitization where possible. Consider isolating copyparty instances in segmented network zones to reduce lateral movement risk if an insider threat exploits this vulnerability. Regularly audit user permissions and review server logs for anomalies.

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

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