Unauthenticated arbitrary file read and remote code execution in CrushFTP
A server side template injection vulnerability in CrushFTP in all versions before 10.7.1 and 11.1.0 on all platforms allows unauthenticated remote attackers to read files from the filesystem outside of the VFS Sandbox, bypass authentication to gain administrative access, and perform remote code execution on the server.
- Published
- Apr 22, 2024
- Updated
- Jun 17, 2026
- EPSS
- 99.5% · 100th percentile
- CWE
- CWE-1336
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Report tools
Action score
100
Now
Patch today or shut off access.
- CVSS
- 40 / 40 · 10.0 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 30 / 30 · 99.5%
CISA SSVC decision
- Exploitation
- active
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 10.0
- CNA · directcyber
- 9.8
- 0.2 point gap
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Apr 24, 2024. That signals real attacks, not theory.
Remediation deadline for government agencies: May 1, 2024.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| crushftp | crushftp | cpe:2.3:a:crushftp:crushftp |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- crushftp crushftp10.0.0 and later · before 10.7.1
- crushftp crushftp11.0.0 and later · before 11.1.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (directcyber). Independent of NVD's CPE analysis and usually ahead of it.
CrushFTP CrushFTP
- 10.0 and later · before 10.7.1affected · semver
- 11.0 and later · before 11.1.0affected · semver
Same product
crushftp: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-31161CrushFTP 10 before 10.8.4 and 11 before 11.3.1 allows authentication bypass and takeover of the crushadmin account (unless a DMZ proxy instaKEV99Now
- CVE-2025-54309CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allowsKEV97Now
- CVE-2023-43177CrushFTP prior to 10.5.1 is vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes.64This week
- CVE-2024-53552CrushFTP 10 before 10.8.3 and 11 before 11.2.3 mishandles password reset, leading to account takeover.39Monitor
- CVE-2017-14035CrushFTP 8.x before 8.2.0 has a serialization vulnerability.39Monitor
- CVE-2025-32103CrushFTP 9.x and 10.x through 10.8.4 and 11.x through 11.3.1 allows directory traversal via the /WebInterface/function/ URI to read files ac25Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| CrushFTP CrushFTP | 10.7.1 | Vendor (CNA) |
| CrushFTP CrushFTP | 11.1.0 | Vendor (CNA) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×19
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Metasploit module | auxiliary/gather/crushftp_fileread_cve_2024_4040CrushFTP Unauthenticated Arbitrary File Readauxiliary | — |
| Nuclei detection template | Nuclei template CVE-2024-4040 | — |
| Proof-of-concept repository on GitHub | stars:15 | 2024-04-25 |
| Proof-of-concept repository on GitHub | stars:55 | 2024-04-23 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-04-25 |
| Proof-of-concept repository on GitHub | stars:67 | 2024-04-25 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-04-28 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-04-29 |
| Proof-of-concept repository on GitHub | stars:5 | 2024-04-30 |
| Proof-of-concept repository on GitHub | stars:5 | 2024-05-01 |
| Proof-of-concept repository on GitHub | stars:7 | 2024-05-03 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-05-13 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoCsame day
- CISA KEV+1 d
- TodaySep 29, 2026+890 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-1336 · Improper Neutralization of Special Elements Used in a Template EngineCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.bleepingcomputer.com/news/security/crushftp-warns-users-to-patch-exploited-zero-day-immediately/
- www.crushftp.com/crush10wiki/Wiki.jsp?page=Update
- www.crushftp.com/crush11wiki/Wiki.jsp?page=Update
- www.rapid7.com/blog/post/2024/04/23/etr-unauthenticated-crushftp-zero-day-enables-complete-server-compromise/
- www.reddit.com/r/cybersecurity/comments/1c850i2/all_versions_of_crush_ftp_are_vulnerable/
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4040
Vendor advisories and official records. Exploit/PoC links are deliberately left out.