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CVE-2025-7783: Critical Vulnerability in form-data

CVE-2025-7783 represents a critical vulnerability in the form-data library, allowing for HTTP Parameter Pollution (HPP). Organizations must act swiftly to remediate this issue due to its severe impact on confidentiality and integrity.

CRITICALPublic ExploitCVSS 9.4 · Published July 18, 2025

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CVE-2025-7783 is classified as a critical vulnerability with a CVSS score of 9.4. This vulnerability allows for HTTP Parameter Pollution (HPP) due to the use of insufficiently random values in the form-data library. Attackers may leverage this vulnerability to manipulate HTTP requests, potentially leading to unauthorized actions and data exposure. Organizations must prioritize patching this vulnerability immediately to prevent exploitation.

The exploitation status for CVE-2025-7783 indicates that there is a confirmed exploit available. This raises the urgency for defenders to address this vulnerability, as its exploitation could severely impact the confidentiality and integrity of affected systems. Organizations should take immediate action to assess their exposure to this vulnerability.

The vulnerability affects versions of the form-data library prior to 2.5.4, as well as 3.0.0 to 3.0.3 and 4.0.0 to 4.0.3. With a high attack complexity and no privileges required for exploitation, the risk to organizations includes potential unauthorized access and data manipulation. Therefore, organizations should schedule remediation as a priority.

In summary, CVE-2025-7783 poses a critical risk to organizations using the affected versions of the form-data library. Organizations must act promptly to patch this vulnerability and mitigate associated risks.

Vulnerability Details

The CVE description states that CVE-2025-7783 is a vulnerability in the form-data library that allows for HTTP Parameter Pollution due to the use of insufficiently random values. This issue affects versions less than 2.5.4, and 3.0.0 to 3.0.3, as well as 4.0.0 to 4.0.3.

The CVSS score for this vulnerability is 9.4, indicating a critical severity level. The high score is attributed to the potential high impact on confidentiality and integrity.

Technical Analysis

The root cause of this vulnerability is the insufficient randomness in value generation within the form-data library. The attack vector is network-based, requiring minimal complexity and no privileges for successful exploitation. User interaction is not required, and both confidentiality and integrity impacts are high while availability is not affected.

Risk & Impact Analysis

The real-world deployment risk associated with CVE-2025-7783 is significant, primarily due to the critical nature of the vulnerability and its exploitation potential. The blast radius includes any systems utilizing the affected versions of the form-data library. Organizations must address this vulnerability in their priority patch cycle to mitigate risks.

Exploitation Status

Signal

Status

Known Exploit

Yes

Public PoC

Yes

Actively Exploited

No

Ransomware Use

No

Affected Versions

The affected versions of the form-data library include any versions less than 2.5.4, as well as versions 3.0.0 through 3.0.3 and 4.0.0 through 4.0.3.

Mitigation & Remediation

Organizations should prioritize patching this vulnerability immediately. The recommended course of action is to upgrade to a version of the form-data library that is not affected by the vulnerability. If a patch is unavailable, organizations should consider implementing configuration hardening and network controls to mitigate potential risks. For further guidance on security practices, organizations may refer to penetration testing services to identify weaknesses.

Detection Guidance

To detect potential exploitation of CVE-2025-7783, organizations should monitor logs for unusual parameter manipulations and HTTP requests that deviate from expected patterns. Behavioral anomalies, such as unexpected application responses to API calls, may also indicate exploitation attempts. Additionally, organizations should establish network signatures that can identify malicious activity associated with this vulnerability.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2025-7783 highlights the importance of using secure randomness in libraries that handle critical data operations. This vulnerability represents a pattern where insufficiently random values can lead to severe security issues, reminding security teams to enforce best practices in coding and library selection. Organizations must adopt strategic defensive measures to ensure the integrity of their applications, which includes regular security reviews and implementing comprehensive testing protocols. For additional insights on security best practices, organizations can refer to penetration testing methodology and vulnerability management program design articles to enhance their security posture.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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