CVE-2025-54140 json
pyLoad has Path Traversal Vulnerability in json/upload Endpoint that allows Arbitrary File Write
published 2025-07-21 15 mo ago modified 2026-07-07 4 mo ago also EUVD-2025-22382 , GHSA-xqpg-92fq-grfg , PYSEC-2026-1823
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
pyLoad is a free and open-source Download Manager written in pure Python. In version 0.5.0b3.dev89, an authenticated path traversal vulnerability exists in the /json/upload endpoint of pyLoad. By manipulating the filename of an uploaded file, an attacker can traverse out of the intended upload directory, allowing them to write arbitrary files to any location on the system accessible to the pyLoad process. This may lead to: Remote Code Execution (RCE), local privilege escalation, system-wide compromise, persistence, and backdoors. This is fixed in version 0.5.0b3.dev90.
Patch / fix
- pypi pyload-ng 0.5.0b3.dev90
- pyload-ng_project pyload-ng 0.5.0b3.dev90
- pyload pyload 0.5.0b3.dev90
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 15 mo ago
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyload-ng | >=0.5.0b3.dev89, <0.5.0b3.dev90 |
0.5.0b3.dev90 |
Affected products
- pyload pyload
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/pyload/pyload/commit/fc4b136e9c4e7dcbb8e467ae802cb2c3f70a71b0
web
-
github.com
/pyload/pyload/security/advisories/GHSA-xqpg-92fq-grfg
web
-
github.com
/pyload/pyload/blob/df094db67ec6e25294a9ac0ddb4375fd7fb9ba00/src/pyload/webui/app/blueprints/json_blueprint.py
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-54140
advisory
-
github.com
/pyload/pyload
package
-
pypi.org
/project/pyload-ng
package
-
github.com
/advisories/GHSA-xqpg-92fq-grfg
advisory
Sources
- CVE List CVE-2025-54140
- GitHub Advisory GHSA-xqpg-92fq-grfg
- NVD CVE-2025-54140
- OSV PYSEC-2026-1823
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.