Arbitrary File Overwrite via HTTP POST in Pingvin Share

published 2025-01-08 22 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-2656

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits: 0; none known

Pingvin Share is a self-hosted file sharing platform and an alternative for WeTransfer. This vulnerability allows an authenticated or unauthenticated (if anonymous shares are allowed) user to overwrite arbitrary files on the server, including sensitive system files, via HTTP POST requests. The issue has been patched in version 1.4.0.

Patch / fix

links 2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 22 mo ago (2025-01-08)

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

stonith404 pingvin-share

Classification

Weakness

CWE-20 Improper Input Validation
CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

CVE List CVE-2025-22137
NVD CVE-2025-22137

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.

Summary