CVE-2026-78391Network attack vector

Stored XSS via wallet address onclick injection

Published Aug 24, 2026 · Updated Aug 24, 2026

Stored XSS in RansomLook 2.0.0 and earlier allows remote attackers to execute JavaScript through a crafted wallet record. The wallet detail template places externally sourced addresses and chain names inside an inline onclick string, where browser decoding turns escaped quotes back into executable syntax. An attacker must place a malicious record in an ingested upstream feed; execution occurs when a user clicks CSV export and runs with that user's application privileges.

CVSS severity8.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in RansomLook 2.0.0 and earlier allows remote attackers to execute JavaScript through a crafted wallet record. The wallet detail template places externally sourced addresses and chain names inside an inline onclick string, where browser decoding turns escaped quotes back into executable syntax. An attacker must place a malicious record in an ingested upstream feed; execution occurs when a user clicks CSV export and runs with that user's application privileges.

The record

CVE
CVE-2026-78391
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
RansomLook
Product
RansomLook
Classifications
CWE-79, CAPEC-63, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 2026Record 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=0 <=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RansomLook · RansomLookversion=0 <=2.0.0

Published CVSS scores

8.8CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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