CVE-2026-103050 - Vulnerability Details - OpenCVE

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS. This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Wikimedia	Mediawiki - Massmessage Extension

No data.

No data.

References

Link	Providers
https://gerrit.wikimedia.org/r/c/1346089
https://phabricator.wikimedia.org/T432341

History

Wed, 30 Sep 2026 21:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Wikimedia Wikimedia mediawiki - Massmessage Extension
Vendors & Products		Wikimedia Wikimedia mediawiki - Massmessage Extension

Wed, 30 Sep 2026 20:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 29 Sep 2026 23:30:00 +0000

Type	Values Removed	Values Added
Description		Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS. This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.
Title		Stored i18n XSS in MassMessage
Weaknesses		CWE-79
References		https://gerrit.wikimedia.org/r/c/1346089 https://phabricator.wikimedia.org/T432341

MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published: 2026-09-29T23:11:02.272Z

Updated: 2026-09-30T20:01:03.537Z

Reserved: 2026-09-29T22:29:40.415Z

Link: CVE-2026-103050

Vulnrichment

Updated: 2026-09-30T18:14:51.770Z

NVD

Status : Awaiting Analysis

Published: 2026-09-30T00:16:35.370

Modified: 2026-09-30T21:17:08.270

Link: CVE-2026-103050

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103050", "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "state": "PUBLISHED", "assignerShortName": "wikimedia-foundation", "dateReserved": "2026-09-29T22:29:40.415Z", "datePublished": "2026-09-29T23:11:02.272Z", "dateUpdated": "2026-09-30T20:01:03.537Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "shortName": "wikimedia-foundation", "dateUpdated": "2026-09-29T23:11:02.272Z"}, "title": "Stored i18n XSS in MassMessage", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}], "affected": [{"vendor": "The Wikimedia Foundation", "product": "Mediawiki - MassMessage extension", "repo": "https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/MassMessage/+/refs/heads/master", "versions": [{"status": "affected", "version": "0", "lessThan": "1.46.1, 1.45.5, 1.43.10", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.\n\nThis issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.<p>This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.</p>"}]}], "references": [{"url": "https://phabricator.wikimedia.org/T432341", "tags": ["issue-tracking"]}, {"url": "https://gerrit.wikimedia.org/r/c/1346089", "tags": ["mitigation"]}], "credits": [{"lang": "en", "value": "SomeRandomDeveloper", "type": "finder"}, {"lang": "en", "value": "SomeRandomDeveloper", "type": "remediation developer"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-103050", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-30T18:14:37.088220Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-30T20:01:03.537Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-103050", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-30T18:14:37.088220Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-30T18:14:51.770Z"}}], "cna": {"title": "Stored i18n XSS in MassMessage", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "SomeRandomDeveloper"}, {"lang": "en", "type": "remediation developer", "value": "SomeRandomDeveloper"}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}], "affected": [{"repo": "https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/MassMessage/+/refs/heads/master", "vendor": "The Wikimedia Foundation", "product": "Mediawiki - MassMessage extension", "versions": [{"status": "affected", "version": "0", "lessThan": "1.46.1, 1.45.5, 1.43.10", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://phabricator.wikimedia.org/T432341", "tags": ["issue-tracking"]}, {"url": "https://gerrit.wikimedia.org/r/c/1346089", "tags": ["mitigation"]}], "x_generator": {"engine": "Vulnogram 1.0.5"}, "descriptions": [{"lang": "en", "value": "Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.\n\nThis issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.", "supportingMedia": [{"type": "text/html", "value": "Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.<p>This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.</p>", "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": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "shortName": "wikimedia-foundation", "dateUpdated": "2026-09-29T23:11:02.272Z"}}}, "cveMetadata": {"cveId": "CVE-2026-103050", "state": "PUBLISHED", "dateUpdated": "2026-09-30T20:01:03.537Z", "dateReserved": "2026-09-29T22:29:40.415Z", "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "datePublished": "2026-09-29T23:11:02.272Z", "assignerShortName": "wikimedia-foundation"}, "dataVersion": "5.2"}