CVSS 3.1 Score 6.5 of 10 (medium)


Published Sep 11, 2023
Updated: Sep 13, 2023


CVE-2023-4577 is a cyber vulnerability that affects Firefox versions prior to 117, Firefox ESR versions prior to 115.2, and Thunderbird versions prior to 115.2. The vulnerability occurs when the "UpdateRegExpStatics" function tries to access "initialStringHeap", which may have already been garbage collected, leading to a potential exploitable crash. The severity of this vulnerability is rated as MEDIUM with a base score of 6.5 according to NIST. The exploitability score is 2.8, and no privileges are required for exploitation. User interaction is required, and the attack vector is through the network. The impact on integrity and confidentiality is none, but there is a high availability impact.

Leverage our Vulnerability Intelligence module to secure your systems now - get detailed insights on CVE-2024-37364. Book your demo today.


Explore Beyond the CVE Basics with Recorded Future's Vulnerability Intelligence

Note: This is just a basic overview providing quick insights into CVE-2023-4577 information. Gain full access to comprehensive CVE data, risk scores, prioritization, and mitigation data through Recorded Future's Vulnerability Intelligence:
  • Prioritize with Risk-Based Scoring
  • Explore the Extensive Vulnerability Database
  • Receive Early Alerts on Emerging CVEs
  • Focus on Critical Exploitable Vulnerabilities
  • Streamline Remediation with Integration Options