2.7
LOW CVSS 4.0
CVE-2024-51999
express improperly controls modification of query properties
Description

Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. Reason: This candidate was issued in error and is not a valid vulnerability. Notes: All references and descriptions in this candidate have been removed to prevent accidental usage.

INFO

Published Date :

Dec. 1, 2025, 9:15 p.m.

Last Modified :

Dec. 2, 2025, 3:15 p.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2024-51999 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Expressjs express
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 4.0 LOW [email protected]
Solution
Update Express.js to version 5.2.0 or 4.22.0 or later to fix prototype pollution.
  • Update Express.js to a patched version.
  • Ensure the query parser is configured securely.
  • Review and sanitize all user-supplied query parameters.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-51999 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-51999 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Rejected by [email protected]

    Dec. 02, 2025

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Dec. 02, 2025

    Action Type Old Value New Value
    Changed Description Express.js minimalist web framework for node. Prior to 5.2.0 and 4.22.0, when using the extended query parser in express ('query parser': 'extended'), the request.query object inherits all object prototype properties, but these properties can be overwritten by query string parameter keys that match the property names. This vulnerability is fixed in 5.2.0 and 4.22.0. Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. Reason: This candidate was issued in error and is not a valid vulnerability. Notes: All references and descriptions in this candidate have been removed to prevent accidental usage.
    Removed CVSS V4.0 GitHub, Inc.: AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Removed CWE GitHub, Inc.: CWE-915
    Removed Reference GitHub, Inc.: https://github.com/expressjs/express/commit/2f64f68c37c64ae333e41ff38032d21860f22255
    Removed Reference GitHub, Inc.: https://github.com/expressjs/express/releases/tag/4.22.0
    Removed Reference GitHub, Inc.: https://github.com/expressjs/express/releases/tag/v5.2.0
    Removed Reference GitHub, Inc.: https://github.com/expressjs/express/security/advisories/GHSA-pj86-cfqh-vqx6
  • New CVE Received by [email protected]

    Dec. 01, 2025

    Action Type Old Value New Value
    Added Description Express.js minimalist web framework for node. Prior to 5.2.0 and 4.22.0, when using the extended query parser in express ('query parser': 'extended'), the request.query object inherits all object prototype properties, but these properties can be overwritten by query string parameter keys that match the property names. This vulnerability is fixed in 5.2.0 and 4.22.0.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-915
    Added Reference https://github.com/expressjs/express/commit/2f64f68c37c64ae333e41ff38032d21860f22255
    Added Reference https://github.com/expressjs/express/releases/tag/4.22.0
    Added Reference https://github.com/expressjs/express/releases/tag/v5.2.0
    Added Reference https://github.com/expressjs/express/security/advisories/GHSA-pj86-cfqh-vqx6
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 2.7
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability