Vulnerability · Published Sep 17, 2021 · Assigned by @huntrdev
CVE-2021-3803Inefficient Regular Expression Complexity in fb55/nth-check
High 7.5
In plain English
A high-severity regular-expression denial of service in fb55/nth-check from fb55. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 83% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.0)7.5High
Exploit odds (30 days)2.2%top 17.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
nth-check is vulnerable to Inefficient Regular Expression Complexity
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-nth-check | 2.0.1-1 | DEBIAN-CVE-2021-3803 |
| Debian:13 | node-nth-check | 2.0.1-1 | DEBIAN-CVE-2021-3803 |
| Debian:14 | node-nth-check | 2.0.1-1 | DEBIAN-CVE-2021-3803 |
| npm | nth-check | 2.0.1 | GHSA-rp65-9cf3-cjxr |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| fb55 | fb55/nth-check | unspecified – before 2.0.1 |
Weakness: CWE-1333 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H