{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-11261", "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "state": "PUBLISHED", "assignerShortName": "wikimedia-foundation", "dateReserved": "2025-10-03T13:08:05.863Z", "datePublished": "2026-02-03T00:25:00.761Z", "dateUpdated": "2026-02-03T21:07:11.411Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "MediaWiki", "programFiles": ["resources/src/mediawiki.language/mediawiki.language.js"], "repo": "https://gerrit.wikimedia.org/g/mediawiki/core/+/refs/heads/master", "vendor": "Wikimedia Foundation", "versions": [{"lessThan": "1.39.15, 1.43.5, 1.44.2", "status": "affected", "version": "*", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki.<p> This vulnerability is associated with program files <tt>resources/src/mediawiki.Language/mediawiki.Language.Js</tt>.</p><p>This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.</p>"}], "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js.\n\nThis issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 0, "baseSeverity": "NONE", "exploitMaturity": "UNREPORTED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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 (XSS or 'Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "shortName": "wikimedia-foundation", "dateUpdated": "2026-02-03T00:25:00.761Z"}, "references": [{"url": "https://https://phabricator.wikimedia.org/T406322"}, {"url": "https://phabricator.wikimedia.org/T402077"}], "source": {"discovery": "UNKNOWN"}, "title": "Stored i18n XSS exposed by security patch for T402077", "x_generator": {"engine": "Vulnogram 0.5.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-02-03T21:07:05.083676Z", "id": "CVE-2025-11261", "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": "2026-02-03T21:07:11.411Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-11261", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-02-03T21:07:05.083676Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-03T21:07:08.145Z"}}], "cna": {"title": "Stored i18n XSS exposed by security patch for T402077", "source": {"discovery": "UNKNOWN"}, "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 0, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U", "exploitMaturity": "UNREPORTED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://gerrit.wikimedia.org/g/mediawiki/core/+/refs/heads/master", "vendor": "Wikimedia Foundation", "product": "MediaWiki", "versions": [{"status": "affected", "version": "*", "lessThan": "1.39.15, 1.43.5, 1.44.2", "versionType": "semver"}], "programFiles": ["resources/src/mediawiki.language/mediawiki.language.js"], "defaultStatus": "unaffected"}], "references": [{"url": "https://https://phabricator.wikimedia.org/T406322"}, {"url": "https://phabricator.wikimedia.org/T402077"}], "x_generator": {"engine": "Vulnogram 0.5.0"}, "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js.\n\nThis issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.", "supportingMedia": [{"type": "text/html", "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki.<p> This vulnerability is associated with program files <tt>resources/src/mediawiki.Language/mediawiki.Language.Js</tt>.</p><p>This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "shortName": "wikimedia-foundation", "dateUpdated": "2026-02-03T00:25:00.761Z"}}}, "cveMetadata": {"cveId": "CVE-2025-11261", "state": "PUBLISHED", "dateUpdated": "2026-02-03T21:07:11.411Z", "dateReserved": "2025-10-03T13:08:05.863Z", "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "datePublished": "2026-02-03T00:25:00.761Z", "assignerShortName": "wikimedia-foundation"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*", "matchCriteriaId": "3887F820-A69B-4FA5-9C03-9D47CC5034D8", "versionEndExcluding": "1.39.15", "vulnerable": true}, {"criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*", "matchCriteriaId": "32634941-7F0E-4D11-9F0D-791749906561", "versionEndExcluding": "1.43.5", "versionStartIncluding": "1.43.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*", "matchCriteriaId": "123B831C-511C-4877-9FBD-1683674B9298", "versionEndExcluding": "1.44.2", "versionStartIncluding": "1.44.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js.\n\nThis issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2."}, {"lang": "es", "value": "Neutralizaci\u00f3n Incorrecta de Entrada Durante la Generaci\u00f3n de P\u00e1ginas Web (XSS o 'cross-site scripting') vulnerabilidad en Wikimedia Foundation MediaWiki. Esta vulnerabilidad est\u00e1 asociada con los archivos de programa resources/src/mediawiki.Language/mediawiki.Language.Js.\n\nEste problema afecta a MediaWiki: desde * antes de 1.39.15, 1.43.5, 1.44.2."}], "id": "CVE-2025-11261", "lastModified": "2026-03-25T13:46:32.513", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 0.0, "baseSeverity": "NONE", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "UNREPORTED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "type": "Secondary"}]}, "published": "2026-02-03T01:15:57.483", "references": [{"source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "tags": ["Broken Link"], "url": "https://https://phabricator.wikimedia.org/T406322"}, {"source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "tags": ["Permissions Required"], "url": "https://phabricator.wikimedia.org/T402077"}], "sourceIdentifier": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "type": "Secondary"}]}

{"bugzilla": {"description": "MediaWiki: MediaWiki: Cross-site Scripting (XSS) vulnerability", "id": "2436168", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436168"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["A flaw was found in MediaWiki. This vulnerability, known as Cross-site Scripting (XSS), occurs due to improper neutralization of input during web page generation. A remote attacker could exploit this by injecting malicious scripts into web pages. Successful exploitation could lead to arbitrary code execution in the user's browser, information disclosure, or session hijacking."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, restrict network access to the MediaWiki instance to only trusted users and networks. Implement firewall rules to limit inbound connections to the MediaWiki server. Additionally, ensure that only trusted and authorized users are granted permissions to contribute or edit content within the MediaWiki environment."}, "name": "CVE-2025-11261", "public_date": "2026-02-03T00:25:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-11261\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-11261\nhttps://phabricator.wikimedia.org/T402077"], "statement": "This stored cross-site scripting (XSS) vulnerability in MediaWiki, affecting Fedora 42 and Fedora 43, allows an attacker to inject malicious scripts. These scripts can then be executed in the context of other users' browsers due to improper input neutralization during web page generation.", "threat_severity": "Moderate"}