What is CVE-2025-63420?

CVE-2025-63420 is a medium-severity vulnerability in Crushftp, classified under Cross-site Scripting. CVSS score: 4.1/10. Published 2025-11-07.

How severe is CVE-2025-63420?

Medium severity. CVSS v3 base score is 4.1 out of 10.

Is CVE-2025-63420 known to be exploited?

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

XSS in Crushftp

CVE-2025-63420

CrushFTP11 before 11.3.7_57 is vulnerable to stored HTML injection in the CrushFTP Admin Panel (Reports / "Who Created Folder"), enabling persistent HTML execution in admin sessions.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (18.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N.

Affected products

Crushftp
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63420?: CVE-2025-63420 is a medium-severity vulnerability in Crushftp, classified under Cross-site Scripting. CVSS score: 4.1/10. Published 2025-11-07.
How severe is CVE-2025-63420?: Medium severity. CVSS v3 base score is 4.1 out of 10.
Is CVE-2025-63420 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.