ProfessionalWiki Maps Extension up to 12.1.2 Leaflet service jquery.leaflet.js display_map parser function overlays permission

Summaryinfo

A vulnerability marked as critical has been reported in ProfessionalWiki Maps Extension up to 12.1.2. Impacted is the function display_map parser function of the file resources/leaflet/jquery.leaflet.js of the component Leaflet service. Performing a manipulation of the argument overlays results in permission. This vulnerability is reported as CVE-2026-52854. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in ProfessionalWiki Maps Extension up to 12.1.2. This affects the function display_map parser function of the file resources/leaflet/jquery.leaflet.js of the component Leaflet service. The manipulation of the argument overlays with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-52854 since 06/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1222 according to MITRE ATT&CK.

Upgrading to version 12.1.3 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• ProfessionalWiki

Name

• Maps Extension

Version

• 12.1.0
• 12.1.1
• 12.1.2

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion