webpack-dev-server up to 3.1.5 WebSocket Server lib/Server.js Request input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in webpack-dev-server up to 3.1.5. The affected element is an unknown function in the library lib/Server.js of the component WebSocket Server. The manipulation as part of Request leads to input validation. This vulnerability is documented as CVE-2018-14732. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in webpack-dev-server up to 3.1.5. It has been rated as critical. This issue affects some unknown processing in the library lib/Server.js of the component WebSocket Server. The manipulation as part of a Request leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality. The summary by CVE is:

An issue was discovered in lib/Server.js in webpack-dev-server before 3.1.6. Attackers are able to steal developer's code because the origin of requests is not checked by the WebSocket server, which is used for HMR (Hot Module Replacement). Anyone can receive the HMR message sent by the WebSocket server via a ws://127.0.0.1:8080/ connection from any origin.

The bug was discovered 07/24/2018. The weakness was released 09/21/2018 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2018-14732 since 07/28/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 59 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 264716 (Linux Distros Unpatched Vulnerability : CVE-2025-30360), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.1.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (264716). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 264716
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-30360

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: webpack-dev-server 3.1.6
Patch: github.com

Timelineinfo

07/24/2018 🔍
07/28/2018 +3 days 🔍
09/21/2018 +55 days 🔍
09/21/2018 +0 days 🔍
09/22/2018 +1 days 🔍
09/14/2025 +2549 days 🔍

Sourcesinfo

Advisory: f18e5adf123221a1015be63e1ca2491ca45b8d10
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-14732 (🔍)
GCVE (CVE): GCVE-0-2018-14732
GCVE (VulDB): GCVE-100-124361

Entryinfo

Created: 09/22/2018 07:43
Updated: 09/14/2025 22:58
Changes: 09/22/2018 07:43 (60), 03/26/2020 13:35 (2), 05/17/2023 14:43 (5), 09/14/2025 22:58 (21)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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