What is CVE-2023-43177?

CVE-2023-43177 is a critical-severity vulnerability in Crushftp, classified under Improper Control of Dynamically-Managed Code Resources. CVSS score: 9.8/10. Published 2023-11-18.

How severe is CVE-2023-43177?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-43177 known to be exploited?

12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Crushftp

CVE-2023-43177

CrushFTP prior to 10.5.1 is vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes.

Published 2023-11-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.818 (99.6th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.818 · newest: 0.818 · change: 0.000

Affected products

Crushftp

Weakness classification (CWE)

CWE-913 — Improper Control of Dynamically-Managed Code Resources

Public proof-of-concept exploits

References

github.com/the-emmons/CVE-Disclosures/blob/main/Pending/CrushFTP-2023-1.md (Third Party Advisory)
convergetp.com/2023/11/16/crushftp-zero-day-cve-2023-43177-discovered/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-43177?: CVE-2023-43177 is a critical-severity vulnerability in Crushftp, classified under Improper Control of Dynamically-Managed Code Resources. CVSS score: 9.8/10. Published 2023-11-18.
How severe is CVE-2023-43177?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-43177 known to be exploited?: 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.