CVE-2026-73371Network attack vectorHinoki check available

Unauthorized batch copying via improper ACL checks

Published Aug 18, 2026 · Updated Aug 19, 2026

Improper access control in batch copy actions in Joomla! CMS before 5.4.8 and 6.1.3 allows remote authenticated users to copy uneditable items. Joomla's advisory states that the batch copy path does not correctly enforce ACLs on source items that the caller is not allowed to edit, and the reviewed public records do not identify the exact missing check or function beyond that batch copy operation. Reachability requires authenticated access to backend batch actions; the published CVSS 4.0 vector assigns high privileges required and limits the documented impact to unauthorized copying rather than direct item modification or service interruption.

CVSS severity5.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper access control in batch copy actions in Joomla! CMS before 5.4.8 and 6.1.3 allows remote authenticated users to copy uneditable items. Joomla's advisory states that the batch copy path does not correctly enforce ACLs on source items that the caller is not allowed to edit, and the reviewed public records do not identify the exact missing check or function beyond that batch copy operation. Reachability requires authenticated access to backend batch actions; the published CVSS 4.0 vector assigns high privileges required and limits the documented impact to unauthorized copying rather than direct item modification or service interruption.

The record

CVE
CVE-2026-73371
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Joomla! Project
Product
Joomla! CMS
Classifications
CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=4.0.0-5.4.6
  2. Affected versionversion=6.0.0-6.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Joomla! Project · Joomla! CMSversion=4.0.0-5.4.6; version=6.0.0-6.1.2

Published CVSS scores

5.1Joomla! ProjectCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

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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