CVE-2022-31103
HIGHlettersanitizer < 1.0.2 - Denial of Service via CSS @keyframes Processing
Title source: llmDescription
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.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_confirm
https://github.com/mat-sz/lettersanitizer/security/advisories/GHSA-7r3r-gq8p-v9jj
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/mat-sz/react-letter/issues/17
Patch, Third Party Advisory x_refsource_misc
https://github.com/mat-sz/lettersanitizer/commit/96d3dfe2ef0465d47324ed4d13e91ba0816a173f
Scores
CVSS v3
7.5
EPSS
0.0043
EPSS Percentile
62.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-754
Status
published
Products (2)
lettersanitizer_project/lettersanitizer
< 1.0.2
npm/lettersanitizer
0 - 1.0.2npm
Published
Jun 27, 2022
Tracked Since
Feb 18, 2026