VDB-275285 · CVE-2024-27187 · GCVE-0-2024-27187

Joomla CMS up to 4.4.6/5.1.2 Username access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
5.3	$5k-$25k	0.00

Summaryinfo

A vulnerability has been found in Joomla CMS up to 4.4.6/5.1.2 and classified as critical. Affected is an unknown function of the component Username Handler. The manipulation leads to access control. This vulnerability is referenced as CVE-2024-27187. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Joomla CMS up to 4.4.6/5.1.2. This issue affects an unknown part of the component Username Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is integrity. The summary by CVE is:

Improper Access Controls allows backend users to overwrite their username when disallowed.

The weakness was published by Elysee Franchuk. The advisory is shared at developer.joomla.org. The identification of this vulnerability is CVE-2024-27187 since 02/21/2024. The exploitation is known to be difficult. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/05/2025). MITRE ATT&CK project uses the attack technique T1068 for this issue.

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

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Productinfo

Type

Content Management System

Vendor

Joomla

Name

Version

License

open-source

Website

Vendor: https://www.joomla.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (Joomla): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/21/2024 🔍
08/20/2024 +180 days 🔍
08/20/2024 +0 days 🔍
06/05/2025 +289 days 🔍

Sourcesinfo

Vendor: joomla.org

Advisory: developer.joomla.org
Researcher: Elysee Franchuk
Status: Confirmed

CVE: CVE-2024-27187 (🔍)
GCVE (CVE): GCVE-0-2024-27187
GCVE (VulDB): GCVE-100-275285

Entryinfo

Created: 08/20/2024 18:25
Updated: 06/05/2025 04:42
Changes: 08/20/2024 18:25 (54), 08/22/2024 05:38 (12), 06/05/2025 04:42 (1)
Complete: 🔍
Cache ID: 216::103