CVE-2025-59039Known exploitationNetwork attack vector

Cryptocurrency theft via injected browser API hooks

Published Sep 9, 2025 · Updated Sep 10, 2025

Embedded malicious code in Prebid Universal Creative 1.17.3 allows remote attackers to redirect cryptocurrency transactions in browsers. The injected backdoor hooks fetch, XMLHttpRequest, and wallet APIs, then rewrites payment destinations and approval targets to attacker-controlled accounts. Exposure requires loading the compromised npm or jsDelivr release in a browser; the consequence is theft of cryptocurrency or wallet approvals.

CVSS severity9.3
Critical
EPSS probability0.33%
Next 30 days · Sep 17, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Embedded malicious code in Prebid Universal Creative 1.17.3 allows remote attackers to redirect cryptocurrency transactions in browsers. The injected backdoor hooks fetch, XMLHttpRequest, and wallet APIs, then rewrites payment destinations and approval targets to attacker-controlled accounts. Exposure requires loading the compromised npm or jsDelivr release in a browser; the consequence is theft of cryptocurrency or wallet approvals.

The record

CVE
CVE-2025-59039
Published
Sep 9, 2025
Updated
Sep 10, 2025
Vendor
Prebid.org
Product
Prebid Universal Creative
Classifications
CWE-506, T1195.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2025Exploitation reportedMalicious PUC 1.17.3 npm publication
  2. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  3. Sep 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 1.17.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Prebid.org · Prebid Universal Creativeversion== 1.17.3

Published CVSS scores

9.3GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-506Embedded Malicious Code
T1195.002Compromise Software Supply Chain: Software Supply Chain

Public exploit references

No public exploit references are available in this record.

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Reported exploitation

Technologies

Your stack

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Your stack

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