Embedded Malicious Code Affecting prebid.js package, versions >10.9.0 <10.10.0
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-JS-PREBIDJS-12705374
- published16 Sept 2025
- disclosed11 Sept 2025
- creditUnknown
Introduced: 11 Sep 2025
Malicious CVE-2025-59038 (opens in a new tab)How to fix?
Upgrade prebid.js to version 10.10.0 or higher.
Overview
prebid.js is an open source software that is offered for free as a convenience. While it is designed to help companies address legal requirements associated with header bidding, we cannot and do not warrant that your use of Prebid.js will satisfy legal requirements.
Affected versions of this package are vulnerable to Embedded Malicious Code. This package version contains malicious code that monitors network traffic when run in a browser and targets crypto transactions. The injected malicious code activates a hook whenever a Web3 wallet is present. Once triggered, it intercepts and alters any transaction with ETH value, redirecting it to another address likely controlled by the attacker. The malicious code also listens for swap and transfer transactions to manipulate as well.