IPRateLimit Bypass Vulnerability in FileCodeBox by Vastsa
CVE-2025-51663

7.5HIGH

Key Information:

Vendor

Vastsa

Status
FileCodeBox
Vendor
CVE Published:
19 November 2025

What is CVE-2025-51663?

A serious flaw exists in the IPRateLimit implementation of FileCodeBox, potentially allowing remote attackers to circumvent IP-based rate limiting and restrictions on failed attempts. By spoofing the X-Real-IP and X-Forwarded-For HTTP headers, attackers can execute denial-of-service (DoS) attacks or engage in brute force attempts on share codes, jeopardizing the security of user data and service availability.

References

https://github.com/vastsa/FileCodeBox
https://github.com/vastsa/FileCodeBox/issues/350

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.