CVE-2026-52854
Publication date 20 August 2026
Last updated 25 August 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| mediawiki | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
8.6 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-52854
- https://github.com/ProfessionalWiki/Maps/blob/12.1.3/RELEASE-NOTES.md
- https://github.com/ProfessionalWiki/Maps/commit/737a993fc2f40499e9bb22198fd1d56c25613806
- https://github.com/ProfessionalWiki/Maps/pull/899
- https://github.com/ProfessionalWiki/Maps/releases/tag/12.1.3
- https://github.com/ProfessionalWiki/Maps/security/advisories/GHSA-4h7g-5542-v3fc