{"apiVersion":"1.0","identifier":"CVE-2026-52854","description":"Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the display_map parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet layer-control label without escaping it. A wiki user with the edit permission can store malicious wikitext that causes script execution when another user previews or views the affected map. The script executes in the viewing user-s browser session and can access data or perform actions available to that user. This issue is fixed in version 12.1.3.","publishedAt":"2026-08-18T22:16:53","lastModifiedAt":"2026-08-19T19:17:18","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-52854","cvssScore":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","epssProbability":0.00433,"riskScore":0.89,"affectedProduct":"Maps","affectedVersions":"<12.1.3","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-52854","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-52854","en":"https://www.redsauce.net/en/cves/CVE-2026-52854","fr":"https://www.redsauce.net/fr/cves/CVE-2026-52854","pt":"https://www.redsauce.net/pt/cves/CVE-2026-52854","de":"https://www.redsauce.net/de/cves/CVE-2026-52854","sk":"https://www.redsauce.net/sk/cves/CVE-2026-52854","el":"https://www.redsauce.net/el/cves/CVE-2026-52854"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-52854"}}