Improper Verification of Cryptographic Signature Affecting notepad-plus-plus/wingup package, versions [,5.3.8)
Threat Intelligence
Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
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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Test your applications- Snyk IDSNYK-UNMANAGED-NOTEPADPLUSPLUSWINGUP-14413727
- published14 Dec 2025
- disclosed11 Dec 2025
- creditKevin Beaumont
Introduced: 11 Dec 2025
CVE-2025-15556 (opens in a new tab)How to fix?
Upgrade notepad-plus-plus/wingup to version 5.3.8 or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature of the downloaded update file. An attacker in a position to intercept the network traffic between the updater client and the Notepad++ update infrastructure can prompt the updater to download and execute an unwanted binary.