CVE-2026-48954 - Vulnerability Details - OpenCVE

Improper validation leads to a generic XSS vector in the language override feature.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

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 total

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
`3.0.0-5.4.6`	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/1062-20260708-core-xss-through-language-overrides.html

History

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

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

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

Type	Values Removed	Values Added
Description		Improper validation leads to a generic XSS vector in the language override feature.
Title		Joomla! Core - [20260708] - XSS through language overrides
Weaknesses		CWE-79
References		https://developer.joomla.org/security-centre/1062-20260708-core-xss-through-language-overrides.html
Metrics		cvssV4_0 `{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: Joomla

Published: 2026-07-07T17:29:28.797Z

Updated: 2026-07-07T18:43:57.346Z

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

Link: CVE-2026-48954

Vulnrichment

Updated: 2026-07-07T18:43:42.265Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48954", "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "state": "PUBLISHED", "assignerShortName": "Joomla", "dateReserved": "2026-05-26T16:47:13.550Z", "datePublished": "2026-07-07T17:29:28.797Z", "dateUpdated": "2026-07-07T18:43:57.346Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Joomla! CMS", "vendor": "Joomla! Project", "versions": [{"status": "affected", "version": "3.0.0-5.4.6"}, {"status": "affected", "version": "6.0.0-6.1.1"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Morris Baumgarten-Egemole"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Improper validation leads to a generic XSS vector in the language override feature."}], "value": "Improper validation leads to a generic XSS vector in the language override feature."}], "impacts": [{"capecId": "CAPEC-18", "descriptions": [{"lang": "en", "value": "CAPEC-18 XSS Targeting Non-Script Elements"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.9, "baseSeverity": "MEDIUM", "exploitMaturity": "UNREPORTED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "shortName": "Joomla", "dateUpdated": "2026-07-07T17:29:28.797Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://developer.joomla.org/security-centre/1062-20260708-core-xss-through-language-overrides.html"}], "source": {"discovery": "UNKNOWN"}, "title": "Joomla! Core - [20260708] - XSS through language overrides", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-07T18:43:24.410096Z", "id": "CVE-2026-48954", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-07T18:43:57.346Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-48954", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-07T18:43:24.410096Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-07T18:43:42.265Z"}}], "cna": {"title": "Joomla! Core - [20260708] - XSS through language overrides", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Morris Baumgarten-Egemole"}], "impacts": [{"capecId": "CAPEC-18", "descriptions": [{"lang": "en", "value": "CAPEC-18 XSS Targeting Non-Script Elements"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U", "exploitMaturity": "UNREPORTED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Joomla! Project", "product": "Joomla! CMS", "versions": [{"status": "affected", "version": "3.0.0-5.4.6"}, {"status": "affected", "version": "6.0.0-6.1.1"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://developer.joomla.org/security-centre/1062-20260708-core-xss-through-language-overrides.html", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}, "descriptions": [{"lang": "en", "value": "Improper validation leads to a generic XSS vector in the language override feature.", "supportingMedia": [{"type": "text/html", "value": "Improper validation leads to a generic XSS vector in the language override feature.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "shortName": "Joomla", "dateUpdated": "2026-07-07T17:29:28.797Z"}}}, "cveMetadata": {"cveId": "CVE-2026-48954", "state": "PUBLISHED", "dateUpdated": "2026-07-07T18:43:57.346Z", "dateReserved": "2026-05-26T16:47:13.550Z", "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "datePublished": "2026-07-07T17:29:28.797Z", "assignerShortName": "Joomla"}, "dataVersion": "5.2"}