CVE-2022-31103
All versions of lettersanitizer below 1.0.2 are affected by a denial of service issue when processing a CSS at-rule `@keyframes`.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.45% probability · 72th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-754
- Affected
- lettersanitizer project/lettersanitizer
- Source
- security-advisories@github.com
References
- https://github.com/mat-sz/lettersanitizer/commit/96d3dfe2ef0465d47324ed4d13e91ba0816a173fPatch, Third Party Advisory
- https://github.com/mat-sz/lettersanitizer/security/advisories/GHSA-7r3r-gq8p-v9jjThird Party Advisory
- https://github.com/mat-sz/react-letter/issues/17Issue Tracking, Third Party Advisory
- https://github.com/mat-sz/lettersanitizer/commit/96d3dfe2ef0465d47324ed4d13e91ba0816a173fPatch, Third Party Advisory
- https://github.com/mat-sz/lettersanitizer/security/advisories/GHSA-7r3r-gq8p-v9jjThird Party Advisory
- https://github.com/mat-sz/react-letter/issues/17Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.