CVE-2024-6665Public exploitNetwork attack vector

Administrator stored XSS via unescaped YouTube API setting

Published May 15, 2025 · Updated May 17, 2025

Stored XSS in Optimal Access KBucket before 4.1.6 allows remote authenticated users with administrator privileges to inject scripts. The plugin saves and renders the YouTube API setting without sanitizing its submitted value or escaping it for HTML output. An administrator can exploit it even when unfiltered_html is disabled, such as on WordPress multisite, and the script runs when another user views the affected output.

CVSS severity4.8
Medium
EPSS probability0.32%
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 Optimal Access KBucket before 4.1.6 allows remote authenticated users with administrator privileges to inject scripts. The plugin saves and renders the YouTube API setting without sanitizing its submitted value or escaping it for HTML output. An administrator can exploit it even when unfiltered_html is disabled, such as on WordPress multisite, and the script runs when another user views the affected output.

The record

CVE
CVE-2024-6665
Published
May 15, 2025
Updated
May 17, 2025
Vendor
Optimal Access
Product
KBucket
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 17, 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=0 <4.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Optimal Access · KBucketversion=0 <4.1.6

Published CVSS scores

4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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