Insufficient Random Values Vulnerability in form-data by form-data
CVE-2025-7783

9.4CRITICAL

Key Information:

Status
Vendor
CVE Published:
18 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7783?

A vulnerability has been identified within the form-data package, specifically characterized by the use of insufficiently random values, which can lead to HTTP Parameter Pollution (HPP). This flaw affects versions of the library prior to 2.5.4 and certain ranges of versions 3.0.0 through 3.0.3 and 4.0.0 through 4.0.3. Exploitation of this vulnerability could allow attackers to manipulate program input parameters, potentially compromising application security. Users are strongly advised to upgrade to the patched versions to mitigate the risk.

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Deploy the Patch

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-7783-poc
Created by benweissmann

References

https://github.com/form-data/form-data/security/advisorie...
third-party-advisory
https://github.com/form-data/form-data/commit/3d1723080e6...
patch

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

https://github.com/benweissmann
https://github.com/benweissmann
https://github.com/ljharb
JSON
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