Vulnerability · Published Aug 5, 2025 · Assigned by GitHub_M

CVE-2025-54802pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)

Critical 9.8

In plain English

A critical-severity path traversal in pyload from pyload. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.4%top 27.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	pyload-ng	0.5.0b3.dev90	GHSA-48rp-jc79-2264
PyPI	pyload-ng	0.5.0b3.dev90	PYSEC-2026-493

Affected products (as reported)

Vendor	Product	Versions
pyload	pyload	>= 0.5.0b3.dev89, < 0.5.0b3.dev90

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/pyload/pyload/security/advisories/GHSA-48rp-jc79-2264 x_refsource_CONFIRM
https://github.com/pyload/pyload/pull/4596 x_refsource_MISC
https://github.com/pyload/pyload/commit/70a44fe02c03bce92337b5d370d2a45caa4de3d4 x_refsource_MISC