VDB-175599 · CVE-2021-33502 · Nessus 236651

normalize-url up to 4.5.0/5.3.0/6.0.0 on Node.js data URL incorrect regex

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.4	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in normalize-url up to 4.5.0/5.3.0/6.0.0 on Node.js. The affected element is an unknown function of the component data URL Handler. Performing a manipulation results in incorrect regex. This vulnerability is cataloged as CVE-2021-33502. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in normalize-url up to 4.5.0/5.3.0/6.0.0 on Node.js (JavaScript Library). This affects an unknown code of the component data URL Handler. The manipulation with an unknown input leads to a incorrect regex vulnerability. CWE is classifying the issue as CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. This is going to have an impact on availability.

The weakness was shared 05/25/2021. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2021-33502. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 236651 (Alibaba Cloud Linux 3 : 0014: nodejs:14 (ALINUX3-SA-2022:0014)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.5.1, 5.3.1 or 6.0.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (236651). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

JavaScript Library

Name

normalize-url

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 236651
Nessus Name: Alibaba Cloud Linux 3 : 0014: nodejs:14 (ALINUX3-SA-2022:0014)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: normalize-url 4.5.1/5.3.1/6.0.1

Timelineinfo

05/21/2021 🔍
05/25/2021 +4 days 🔍
05/25/2021 +0 days 🔍
05/18/2025 +1454 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-33502 (🔍)
GCVE (CVE): GCVE-0-2021-33502
GCVE (VulDB): GCVE-100-175599

Entryinfo

Created: 05/25/2021 09:10
Updated: 05/18/2025 20:54
Changes: 05/25/2021 09:10 (40), 05/27/2021 15:03 (6), 05/18/2025 20:54 (16)
Complete: 🔍
Cache ID: 216::103