CVE-2022-31103
7.5 · HIGHOverview
CVE-2022-31103 is a high-severity vulnerability affecting lettersanitizer_project lettersanitizer. It was published on June 27, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from lettersanitizer_project. Update lettersanitizer to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| lettersanitizer_project | lettersanitizer | >= 0, < 1.0.2 | Affected |
References
Frequently Asked Questions
What is CVE-2022-31103?
CVE-2022-31103 is a high-severity vulnerability affecting lettersanitizer_project lettersanitizer. It was published on June 27, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2022-31103?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2022-31103?
Check the references section for vendor advisories and patches from lettersanitizer_project. Update lettersanitizer to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2022-31103?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-31103 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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