How severe is CVE-2023-51931?

CVE-2023-51931 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-2023-51931 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51931?

CVE-2023-51931 affects Alanclarke Urlite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-51931?

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.

Does CVE-2023-51931 have an EU (EUVD) identifier?

Yes. CVE-2023-51931 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56611.

When was CVE-2023-51931 published?

CVE-2023-51931 was published on 2024-02-16 and last updated on 2026-06-17.

CVE-2023-51931

CVE-2023-51931 is a high-severity vulnerability in Alanclarke Urlite 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% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56611
Weakness: CWE-1333
Affected product: Alanclarke Urlite
Published: 2024-02-16
Last modified: 2026-06-17

Description

An issue in alanclarke URLite v.3.1.0 allows an attacker to cause a denial of service (DoS) via a crafted payload to the parsing function.

Frequently asked questions

What is CVE-2023-51931?: An issue in alanclarke URLite v.3.1.0 allows an attacker to cause a denial of service (DoS) via a crafted payload to the parsing function.
How severe is CVE-2023-51931?: CVE-2023-51931 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-2023-51931 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51931?: CVE-2023-51931 affects Alanclarke Urlite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-51931?: 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.
Does CVE-2023-51931 have an EU (EUVD) identifier?: Yes. CVE-2023-51931 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56611.
When was CVE-2023-51931 published?: CVE-2023-51931 was published on 2024-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:alanclarke:urlite:*:*:*:*:*:node.js:*:*

Other CWE-1333 vulnerabilities

CVE-2026-35458 — Critical (CVSS 9.8): Gotenberg is an API for converting document formats. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile…
CVE-2023-29486 — Critical (CVSS 9.8): An issue was discovered in Heimdal Thor agent versions 3.4.2 and before 3.7.0 on Windows, allows attackers to bypass…
CVE-2026-25547 — Critical (CVSS 9.2): @isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1,…
CVE-2023-29487 — Critical (CVSS 9.1): An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and 2.6.9 and before on macOS,…
CVE-2026-47138 — High (CVSS 8.7): Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to…
CVE-2025-6998 — High (CVSS 8.7): ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated…

Browse all CWE-1333 vulnerabilities →