CVE-2025-59039: 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-...

Description

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 The maintainers of PUC unpublished version 1.17.3.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.

Metrics

CVSS 4.0

9.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.31%

22.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-506

References

Timeline

Published: Sep 9, 2025
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2025-59039?

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 The maintainers of PUC unpublished version 1.17.3.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.

How severe is CVE-2025-59039?

CVE-2025-59039 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2025-59039?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.