[css-what] css-what vulnerable to ReDoS due to use of insecure regular expression

The package css-what before 2.1.3 is vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of insecure regular expression in the re_attr variable of index.js. The exploitation of this vulnerability could be triggered via the parse function.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-21222
• https://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488
• https://github.com/fb55/css-what/commit/dc510929790da6617e7aa93a616498b22f6a6b72
• https://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js#23L12
• https://github.com/advisories/GHSA-p28h-cc7q-c4fg