Joomla Project Joomla Extension up to 4.0.0/5.4.7/6.0.0/6.1.2 Custom Fields improper authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3$5k-$25k0.00

Summaryinfo

A vulnerability was found in Joomla Project Joomla Extension up to 4.0.0/5.4.7/6.0.0/6.1.2. It has been declared as critical. This issue affects some unknown processing of the component Custom Fields. The manipulation results in improper authorization. This vulnerability is cataloged as CVE-2026-72531. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Joomla Project Joomla Extension up to 4.0.0/5.4.7/6.0.0/6.1.2. Affected is some unknown processing of the component Custom Fields. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Joomla! Core - [20260804] - Improper ACL checks for custom fields webservice endpoints in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper access check allows unauthorized users to create fields for inaccessible components.

This vulnerability is traded as CVE-2026-72531 since 08/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/19/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-2926). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Joomla

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/10/2026 CVE reserved
08/18/2026 +8 days Advisory disclosed
08/18/2026 +0 days VulDB entry created
08/19/2026 +1 days VulDB entry last update

Sourcesinfo

Status: Confirmed

CVE: CVE-2026-72531 (🔒)
GCVE (CVE): GCVE-0-2026-72531
GCVE (VulDB): GCVE-100-391824
CERT Bund: WID-SEC-2026-2926 - Joomla: Mehrere Schwachstellen

Entryinfo

Created: 08/18/2026 18:34
Updated: 08/19/2026 17:58
Changes: 08/18/2026 18:34 (64), 08/19/2026 17:58 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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