# CrushFTP: Authentication Bypass Vulnerability · pwn.watch

> CrushFTP contains an authentication bypass vulnerability in the HTTP authorization header that allows a remote unauthenticated attacker to authenticate to any known or guessable user account (e.g., crushadmin), potentially leading to a full compromise. Added to CISA KEV on 2025-04-07.

Page: https://pwn.watch/i/crushftp-cve-2025-31161 · generated 2026-10-22T20:45:43.249Z

## Status
- Severity: critical · status: closed · patch: patched
- Product: CrushFTP
- Started: 2025-04-07 · closed: 2025-04-07
- CVEs: CVE-2025-31161
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/crushftp-cve-2025-31161/feed.xml
- JSON Feed: https://pwn.watch/i/crushftp-cve-2025-31161/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/crushftp-cve-2025-31161.json
- This file: https://pwn.watch/i/crushftp-cve-2025-31161/llms.txt

## Updates (newest first)
- 2025-04-07: CISA added CVE-2025-31161 to the KEV catalog (due 2025-04-28).

## Fix brief
# Security brief: CrushFTP: Authentication Bypass Vulnerability

Source: https://pwn.watch/i/crushftp-cve-2025-31161 · status: closed (closed Apr 7, 2025) · severity: critical · updated Apr 7, 2025

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
CrushFTP contains an authentication bypass vulnerability in the HTTP authorization header that allows a remote unauthenticated attacker to authenticate to any known or guessable user account (e.g., crushadmin), potentially leading to a full compromise. Added to CISA KEV on 2025-04-07.

Severity detail: CVSS 9.8 (CNA, v3.1); actively exploited (CISA KEV); known ransomware use

- Product: CrushFTP
- CVE / advisory ids: CVE-2025-31161

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Apr 7, 2025: CISA added CVE-2025-31161 to the KEV catalog (due 2025-04-28).

## Advisories
- [CrushFTP advisory: CrushFTP](https://www.crushftp.com/crush11wiki/Wiki.jsp?page=Update) (CrushFTP)
- [NVD: CVE-2025-31161](https://nvd.nist.gov/vuln/detail/CVE-2025-31161) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

---
Machine-readable: https://pwn.watch/i/crushftp-cve-2025-31161.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.