Vulnerabilities > CVE-2022-31103 - Improper Check for Unusual or Exceptional Conditions vulnerability in Lettersanitizer Project Lettersanitizer 1.0.0/1.0.1
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
lettersanitizer is a DOM-based HTML email sanitizer for in-browser email rendering. 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](https://github.com/mat-sz/react-letter), therefore everyone using react-letter is also at risk. The problem has been patched in version 1.0.2.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 2 |