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7.5
HIGH CVSS 3.1
CVE-2025-51495
Mongoose WebSocket Integer Overflow Vulnerability
Description

An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow.

INFO

Published Date :

Sept. 29, 2025, 5:15 p.m.

Last Modified :

Oct. 16, 2025, 5 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-51495 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 Cesanta mongoose
: Total Affected Vendor : 1 | Products : 1
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 3.1 HIGH 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Update Mongoose to a version that fixes the integer overflow vulnerability.
  • Update Mongoose to a non-vulnerable version.
  • Apply vendor patches when available.
  • Validate WebSocket request handling logic.
  • Address potential buffer overflows if integrated.
Public PoC/Exploit Available at Github

CVE-2025-51495 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-51495.

URL Resource
https://github.com/cainiao159357/CVE-2025-51495 Exploit
https://github.com/cesanta/mongoose Product
https://github.com/cesanta/mongoose/pull/3131 Issue Tracking Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-51495 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-51495 weaknesses.

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).

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nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 1 day, 8 hours ago
7335 stars 1209 fork 1209 watcher
Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 827 different CVEs too.

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

The following list is the news that have been mention CVE-2025-51495 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-51495 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.

  • Initial Analysis by [email protected]

    Oct. 16, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* versions from (including) 7.5 up to (including) 7.17
    Added Reference Type MITRE: https://github.com/cainiao159357/CVE-2025-51495 Types: Exploit
    Added Reference Type MITRE: https://github.com/cesanta/mongoose Types: Product
    Added Reference Type MITRE: https://github.com/cesanta/mongoose/pull/3131 Types: Issue Tracking, Patch
  • CVE Modified by [email protected]

    Oct. 01, 2025

    Action Type Old Value New Value
    Removed Reference http://mongoose.com
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 30, 2025

    Action Type Old Value New Value
    Added CWE CWE-190
    Removed CWE CWE-121
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 29, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-121
  • New CVE Received by [email protected]

    Sep. 29, 2025

    Action Type Old Value New Value
    Added Description An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow.
    Added Reference http://mongoose.com
    Added Reference https://github.com/cainiao159357/CVE-2025-51495
    Added Reference https://github.com/cesanta/mongoose
    Added Reference https://github.com/cesanta/mongoose/pull/3131
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: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact