CVE-2025-59424Public exploitNetwork attack vector

Stored XSS via insufficient username validation

Published Sep 18, 2025 · Updated Sep 18, 2025

Stored XSS in Kovah LinkAce before 2.3.1 allows remote authenticated users to execute JavaScript in audit-log viewers' browsers. UpdateUserProfileInformation accepts username input as a general string, and the audit page renders the stored value without neutralizing script markup. Exploitation requires a standard account to save the payload and create an audit event, followed by a user with audit-log access viewing the page.

CVSS severity7.3
High
EPSS probability0.34%
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 Kovah LinkAce before 2.3.1 allows remote authenticated users to execute JavaScript in audit-log viewers' browsers. UpdateUserProfileInformation accepts username input as a general string, and the audit page renders the stored value without neutralizing script markup. Exploitation requires a standard account to save the payload and create an audit event, followed by a user with audit-log access viewing the page.

The record

CVE
CVE-2025-59424
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
Kovah
Product
LinkAce
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=< 2.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kovah · LinkAceversion=< 2.3.1

Published CVSS scores

7.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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