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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.0.2"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Semantic MediaWiki", "source": "cna", "vendor": "Semantic MediaWiki"}, "product": "semantic_mediawiki", "vendor": "semantic-mediawiki"}], "analysis": {"en": {"generated_at": "2026-04-21T22:46:40.990846+00:00", "value": {"mitigation_remediation": ["Update Semantic MediaWiki to version 5.0.2 or later to apply the vendor patch.", "Educate users to avoid clicking on unknown or suspicious links that target the affected endpoint.", "If patching cannot be performed immediately, block or disable the '/index.php/Speciaal:GefacetteerdZoeken' endpoint via web server or application configuration, or apply a WAF rule to reject script payloads in query parameters."], "summary": {"action": "Patch", "impact": "Cross\u2011Site Scripting allowing theft of session cookies and unauthorized actions"}, "threat_synthesis": {"affected_systems": "Semantic MediaWiki, any release earlier than 5.0.2, is vulnerable. Versions 5.0.2 and newer contain the fix.", "description_and_impact": "Cross\u2011Site Scripting (XSS) is reflected in the Semantic MediaWiki application. By sending a victim a specially crafted URL that includes malicious JavaScript in the '/index.php/Speciaal:GefacetteerdZoeken' endpoint parameter, an attacker can run code in the victim\u2019s browser. This can lead to theft of session cookies, privilege escalation or other actions performed with the victim\u2019s credentials.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 5.1, indicating moderate severity. No EPSS score is reported and it is not listed in the CISA KEV catalog, but the exploit is straightforward: an attacker only needs to embed the malicious payload in a URL that the victim visits. The attack does not require authentication and can be performed from any network, making it a classic reflected XSS risk."}}}}, "created": "2026-04-21T17:00:11.938510+00:00", "updated": "2026-04-21T23:00:03.477356+00:00", "vendors": ["semantic-mediawiki", "semantic-mediawiki$PRODUCT$semantic_mediawiki"]}