Improper Certificate Validation Affecting Firefox package, versions [,134)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Jan 2025
- disclosed7 Jan 2025
- creditPaul Gerste
Introduced: 7 Jan 2025
NewCVE-2025-0239 (opens in a new tab)How to fix?
Upgrade Firefox to version 134 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation due to improper validation of certificates during redirection to an insecure site via the Alt-Svc header. An attacker can intercept and manipulate secure traffic by exploiting this certificate validation flaw.