CVE-2025-59039: Prebid Prebid-Universal-Creative

Critical severity, CVSS 9.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Prebid Universal Creative (PUC) is a JavaScript API to render multiple formats. Npm users of PUC 1.17.3 or PUC latest were briefly affected by crypto-related malware. This includes the extremely popular jsdelivr hosting of this file. The maintainers of PUC unpublished version 1.17.3. Users should see Prebid.js 9 release notes for suggestions on moving off the deprecated workflow of using the PUC or pointing to a dynamic version of it. PUC users pointing to latest should transition to 1.17.2 as soon as possible to avoid similar attacks in the future.

Affected products

• Prebid Prebid-Universal-Creative: version 1.17.3 only

Published 2025-09-09. Last modified 2026-06-17.