CVE-2025-12486Network attack vector

Remote code execution via unsanitized event-log usernames

Published Nov 6, 2025 · Updated Nov 6, 2025

Stored cross-site scripting in Heimdall Data Database Proxy 23.11.06.1 allows remote attackers to execute code after user interaction. The database event-log UI renders attacker-controlled usernames without sanitization, allowing injected script to execute in the target user's application context. An unauthenticated network attacker can plant the payload, but a target user must view the affected log entry; the published impact is arbitrary code execution in that user's context.

CVSS severity8.8
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Heimdall Data Database Proxy 23.11.06.1 allows remote attackers to execute code after user interaction. The database event-log UI renders attacker-controlled usernames without sanitization, allowing injected script to execute in the target user's application context. An unauthenticated network attacker can plant the payload, but a target user must view the affected log entry; the published impact is arbitrary code execution in that user's context.

The record

CVE
CVE-2025-12486
Published
Nov 6, 2025
Updated
Nov 6, 2025
Vendor
Heimdall Data
Product
Heimdall Database Proxy
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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=23.11.06.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Heimdall Data · Heimdall Database Proxyversion=23.11.06.1

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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