Improper Input Validation Affecting Firefox package, versions [,140.0-beta1)
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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- published27 Jun 2025
- disclosed24 Jun 2025
- creditAmeen Basha M K
Introduced: 24 Jun 2025
NewCVE-2025-6435 (opens in a new tab)How to fix?
Upgrade Firefox to version 140.0-beta1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Input Validation via the Save as process in Devtools, which could allow files to be downloaded without proper sanitization of their extensions. An attacker can cause users to download files with misleading or unsafe extensions by enticing them to use the affected feature.