CVE-2025-22137: Arbitrary File Overwrite via HTTP POST in Pingvin Share

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-01-08 · updated 2026-06-17
Weakness: CWE-20

Description

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.

Affected products

stonith404 pingvin-share: from 0.6.0, < 1.4.0

References

https://github.com/stonith404/pingvin-share/commit/6cf5c66fe2eda1e0a525edf7440d047fe2f0e35b
https://github.com/stonith404/pingvin-share/commit/c52ec7192080c402bd804e69be93dd88cc7c5c70
https://github.com/stonith404/pingvin-share/security/advisories/GHSA-rjwx-p44f-mcrv

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