CVE-2026-48958 - Vulnerability Details - OpenCVE

An improper access check allows unauthorized users to create custom fields via webservices endpoints.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Joomla! Project

Joomla! CMS

unaffected

Version	Status	Constraints
`4.0.0-5.4.6`	affected	—
`6.0.0-6.1.1`	affected	—

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://developer.joomla.org/security-centre/1066-20260712-core-incorrect-access-control-in-com-fields-webservice-endpoints.html

History

Tue, 07 Jul 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 07 Jul 2026 18:15:00 +0000

Type	Values Removed	Values Added
Description		An improper access check allows unauthorized users to create custom fields via webservices endpoints.
Title		Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints
Weaknesses		CWE-284
References		https://developer.joomla.org/security-centre/1066-20260712-core-incorrect-access-control-in-com-fields-webservice-endpoints.html
Metrics		cvssV4_0 `{'score': 6.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: Joomla

Published: 2026-07-07T17:32:35.922Z

Updated: 2026-07-07T18:39:28.132Z

Reserved: 2026-05-26T16:47:13.550Z

Link: CVE-2026-48958

Vulnrichment

Updated: 2026-07-07T18:39:16.329Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-284

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48958", "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "state": "PUBLISHED", "assignerShortName": "Joomla", "dateReserved": "2026-05-26T16:47:13.550Z", "datePublished": "2026-07-07T17:32:35.922Z", "dateUpdated": "2026-07-07T18:39:28.132Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Joomla! CMS", "vendor": "Joomla! Project", "versions": [{"status": "affected", "version": "4.0.0-5.4.6"}, {"status": "affected", "version": "6.0.0-6.1.1"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Federico Brasili, https://www.linkedin.com/in/federico-brasili-00b4b7332/"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "An improper access check allows unauthorized users to create custom fields via webservices endpoints."}], "value": "An improper access check allows unauthorized users to create custom fields via webservices endpoints."}], "impacts": [{"capecId": "CAPEC-1", "descriptions": [{"lang": "en", "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.4, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "description": "CWE-284 Improper Access Control", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "shortName": "Joomla", "dateUpdated": "2026-07-07T17:32:35.922Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://developer.joomla.org/security-centre/1066-20260712-core-incorrect-access-control-in-com-fields-webservice-endpoints.html"}], "source": {"discovery": "UNKNOWN"}, "title": "Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-07T18:39:08.720016Z", "id": "CVE-2026-48958", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-07T18:39:28.132Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-48958", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-07T18:39:08.720016Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-07T18:39:16.329Z"}}], "cna": {"title": "Joomla! Core - [20260712] - Incorrect Access Control in com_fields webservice endpoints", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Federico Brasili, https://www.linkedin.com/in/federico-brasili-00b4b7332/"}], "impacts": [{"capecId": "CAPEC-1", "descriptions": [{"lang": "en", "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.4, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Joomla! Project", "product": "Joomla! CMS", "versions": [{"status": "affected", "version": "4.0.0-5.4.6"}, {"status": "affected", "version": "6.0.0-6.1.1"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://developer.joomla.org/security-centre/1066-20260712-core-incorrect-access-control-in-com-fields-webservice-endpoints.html", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}, "descriptions": [{"lang": "en", "value": "An improper access check allows unauthorized users to create custom fields via webservices endpoints.", "supportingMedia": [{"type": "text/html", "value": "An improper access check allows unauthorized users to create custom fields via webservices endpoints.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-284", "description": "CWE-284 Improper Access Control"}]}], "providerMetadata": {"orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "shortName": "Joomla", "dateUpdated": "2026-07-07T17:32:35.922Z"}}}, "cveMetadata": {"cveId": "CVE-2026-48958", "state": "PUBLISHED", "dateUpdated": "2026-07-07T18:39:28.132Z", "dateReserved": "2026-05-26T16:47:13.550Z", "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "datePublished": "2026-07-07T17:32:35.922Z", "assignerShortName": "Joomla"}, "dataVersion": "5.2"}