The code which checks HMAC in form submissions used String.equals() for comparisons, which results in a timing side channel for the comparison of the HMAC signatures. This could lead to remote code execution if an attacker is able to determine the correct signature for their payload. The comparison should be done with a constant time algorithm instead.
Conclusion & alert: CVE-2019-10071 is rated High Risk (74.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 9.82%, 93th percentile).Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.48% over the last day, indicating growing attacker interest.Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2019-10071
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).