How severe is CVE-2023-33289?

CVE-2023-33289 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-33289 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33289?

CVE-2023-33289 affects Urlnorm Project Urlnorm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33289?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-33289 published?

CVE-2023-33289 was published on 2023-06-21 and last updated on 2026-06-17.

CVE-2023-33289

CVE-2023-33289 is a high-severity vulnerability in Urlnorm Project Urlnorm with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Urlnorm Project Urlnorm
Published: 2023-06-21
Last modified: 2026-06-17

Description

The urlnorm crate through 0.1.4 for Rust allows Regular Expression Denial of Service (ReDos) via a crafted URL to lib.rs. NOTE: the Supplier disputes this, taking the position that "Slow printing of URLs is not a CVE."

Frequently asked questions

What is CVE-2023-33289?: The urlnorm crate through 0.1.4 for Rust allows Regular Expression Denial of Service (ReDos) via a crafted URL to lib.rs. NOTE: the Supplier disputes this, taking the position that "Slow printing of URLs is not a CVE."
How severe is CVE-2023-33289?: CVE-2023-33289 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-33289 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33289?: CVE-2023-33289 affects Urlnorm Project Urlnorm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33289?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-33289 published?: CVE-2023-33289 was published on 2023-06-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:urlnorm_project:urlnorm:*:*:*:*:*:rust:*:*

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