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CVE-2025-59038

Prebid.js NPM package briefly compromised

8.6 HighFix available

Prebid.js is a free and open source library for publishers to quickly implement header bidding. NPM users of prebid 10.9.2 may have been briefly compromised by a malware campaign. The malicious code attempts to redirect crypto transactions on the site to the attackers' wallet. Version 10.10.0 fixes the issue. As a workaround, it is also possible to downgrade to 10.9.1.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Active

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.35%Up 0.3 points since Sep 10, 2025
90%50%10%1%

What each source reports

CVE List Score used 8.6

Prebid.js NPM package briefly compromised

Prebid.js is a free and open source library for publishers to quickly implement header bidding. NPM users of prebid 10.9.2 may have been briefly compromised by a malware campaign. The malicious code attempts to redirect crypto transactions on the site to the attackers' wallet. Version 10.10.0 fixes the issue. As a workaround, it is also possible to downgrade to 10.9.1.

Record
CVE-2025-59038
CVSS 4.0
8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-506
Updated
2026-11-02
EUVDEUVD-2025-27596 8.6

Prebid.js is a free and open source library for publishers to quickly implement header bidding. NPM users of prebid 10.9.2 may have been briefly compromised by a malware campaign. The malicious code attempts to redirect crypto transactions on the site to the attackers' wallet. Version 10.10.0 fixes the issue. As a workaround, it is also possible to downgrade to 10.9.1.

Record
EUVD-2025-27596
CVSS 4.0
8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-jwq7-6j4r-2f92 8.6

Prebid.js NPM package briefly compromised

Impact

NPM users of prebid 10.9.2. The malicious code attempts to redirect crypto transactions on the site to the attackers' wallet.

Patches

10.10.0 is solved

References

https://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack

Record
GHSA-jwq7-6j4r-2f92
CVSS 4.0
8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-506
Updated
2026-11-02
NVD 8.6

Prebid.js is a free and open source library for publishers to quickly implement header bidding. NPM users of prebid 10.9.2 may have been briefly compromised by a malware campaign. The malicious code attempts to redirect crypto transactions on the site to the attackers' wallet. Version 10.10.0 fixes the issue. As a workaround, it is also possible to downgrade to 10.9.1.

Record
CVE-2025-59038
CVSS 4.0
8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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
Weakness
CWE-506
Updated
2026-11-02
OSVGHSA-jwq7-6j4r-2f92 8.6

Prebid.js NPM package briefly compromised

Impact

NPM users of prebid 10.9.2. The malicious code attempts to redirect crypto transactions on the site to the attackers' wallet.

Patches

10.10.0 is solved

References

https://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack

Record
GHSA-jwq7-6j4r-2f92
CVSS 4.0
8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-506
Updated
2026-11-02
OSVMAL-2025-46990 No score

Malicious code in prebid.js (npm)


-= Per source details. Do not edit below this line.=-

Source: ghsa-malware (eef953008eb973c33cf8b72ff438a35d772797bcc989e0d909db32655f30615d)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Source: google-open-source-security (4b48cd5b00aa7b72fbf76e991b9e9e2d02899025fc2752cf8316975394598556)

This package was compromised and malicious code added as part of a phishing campaign.

Record
MAL-2025-46990
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
prebid.js
npm
10.9.2 to 10.9.2
10.10.0
prebid.js
npm
10.9.2 up to 10.10.0
10.10.0
prebid.js
npm
Listed versions
10.9.2
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-59038 is a high vulnerability (CVSS 8.6) in Prebid Prebid.js, published September 9, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. Fixed in prebid.js 10.10.0.

References

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