Improper handling of CSS at-rules in lettersanitizer

Description

All versions of lettersanitizer below 1.0.2 are affected by a denial of service issue when processing a CSS at-rule @keyframes.

This package is depended on by react-letter, therefore everyone using react-letter is also at risk.

Recommendation

Update the lettersanitizer package to the latest compatible version. Followings are version details:

• Affected version(s): < 1.0.2
• Patched version(s): 1.0.2

References

• GHSA-7r3r-gq8p-v9jj
• CVE-2022-31103
• CWE-754
• CAPEC-310
• OWASP 2021-A6

Related Issues

• Prototype Pollution in lodash (GHSA-p6mc-m468-83gw) 5 - CVE-2020-8203
• Prototype Pollution in lodash (GHSA-p6mc-m468-83gw) 3 - CVE-2020-8203
• Prototype Pollution in lodash (GHSA-p6mc-m468-83gw) 2 - CVE-2020-8203
• IPX Allows Path Traversal via Prefix Matching Bypass - CVE-2025-54387

Tags:

npm

lettersanitizer