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CVE-2021-33502

HIGHCVSS 7.5/10EPSS 1.70%

Last modified

CVE-2021-33502 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.. EPSS estimates a 1.70% chance of exploitation in the next 30 days.

Description

The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.70%

74.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Normalize-Url ProjectNormalize-Url>= 4.3.0, < 4.5.1
Normalize-Url ProjectNormalize-Url>= 5.0.0, < 5.3.1
Normalize-Url ProjectNormalize-Url6.0.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-33502?
The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.
How severe is CVE-2021-33502?
CVE-2021-33502 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.70% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33502?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33502?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST