What is CVE-2023-51931?

CVE-2023-51931 is a high-severity vulnerability in Alanclarke Urlite, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2024-02-16.

How severe is CVE-2023-51931?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Alanclarke Urlite

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.

Vulnerability class: ReDoS (Regular Expression Denial of Service)

Published 2024-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Alanclarke Urlite

Weakness classification (CWE)

References

gist.github.com/6en6ar/c792d8337b63f095cbda907e834cb4ba (Exploit, Third Party Advisory)
github.com/alanclarke/urlite/issues/61 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2023-51931?: CVE-2023-51931 is a high-severity vulnerability in Alanclarke Urlite, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2024-02-16.
How severe is CVE-2023-51931?: High severity. CVSS v3 base score is 7.5 out of 10.