CVE-2021-33503Not scoredCWE-400

CVE-2021-33503: Python Urllib3 vulnerability

Python · Urllib3

Fixed in 1.26.5 · Affected: Python Urllib3 before 1.26.5 · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

3.3%probability of exploitation in the next 30 days

88th percentile

050100

Higher than 88% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

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Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Uncontrolled Resource Consumption · Denial of Service
Vendor: Python
Published: June 2021
Band: Possible (1 to 10%), June 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-33503 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.