---
title: "CVE-2025-54802: pyLoad CNL Blueprint allows Path Traversal through `dlc_path` which leads to Remote Code Execution (RCE)"
url: https://erroneo.us/security/cve/CVE-2025-54802/
description: "CVE-2025-54802 (pyload-ng (PyPI)): pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-08-05
date_modified: 2025-08-05
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-54802"
kev: false
cvss: 9.8
epss: 0.012
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-54802: pyLoad CNL Blueprint allows Path Traversal through `dlc_path` which leads to Remote Code Execution (RCE)

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.2% , percentile 68: FIRST’s model estimates a 1.2% chance of exploitation activity in the next 30 days, higher than 68% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes pyload-ng (PyPI) <= 0.5.0b3.dev89, fixed in 0.5.0b3.dev90 . Check your lockfile, including transitive dependencies.

## What it is

pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is an opportunity for path traversal in pyLoad-ng CNL Blueprint via package parameter, allowing Arbitrary File Write which leads to Remote Code Execution (RCE). The addcrypted endpoint in pyload-ng suffers from an unsafe path construction vulnerability, allowing unauthenticated attackers to write arbitrary files outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege escalation and remote code execution as root. This issue is fixed in version 0.5.0b3.dev90.

## Affected packages

- PyPI `pyload-ng` <= 0.5.0b3.dev89 → fixed: 0.5.0b3.dev90

## Affected products (CVE record)

- pyload pyload: >= 0.5.0b3.dev89, < 0.5.0b3.dev90

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.20% probability of exploitation activity in the next 30 days; percentile 68.

## Sources

- [GitHub Advisory GHSA-48rp-jc79-2264](https://github.com/advisories/GHSA-48rp-jc79-2264)
- [CVE.org record CVE-2025-54802](https://www.cve.org/CVERecord?id=CVE-2025-54802)
- [NVD entry CVE-2025-54802](https://nvd.nist.gov/vuln/detail/CVE-2025-54802)
- [github.com](https://github.com/pyload/pyload/security/advisories/GHSA-48rp-jc79-2264)
- [github.com](https://github.com/pyload/pyload/pull/4596)
- [github.com](https://github.com/pyload/pyload/commit/70a44fe02c03bce92337b5d370d2a45caa4de3d4)

---
Source page: https://erroneo.us/security/cve/CVE-2025-54802/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt