Secuno
ENNL
Book demo

CVE-2026-52854

Maps cross-site scripting (XSS)

8.6 HIGHEPSS 0.58%
  1. Published18 Aug 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-928838.7
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.1 before…
CVE-2026-938868.3
IBM i 7.3, 7.4, 7.5, and 7.6 could allow a remote authenticated attacker to execute…
CVE-2026-1096338.1
Frappe ERPNext before 15.119.1 and 16.x before 16.32.0 contains a stored cross-site…
CVE-2025-714328.1
Frappe ERPNext before 14.92.1 and 15.x before 15.83.0 contains a reflected cross-site…
CVE-2026-1095588.7
EdgeEver 1.6.0 through 1.112.0 contains a stored cross-site scripting vulnerability in…
CVE-2026-1095578.7
EdgeEver through 1.112.0 contains a stored cross-site scripting vulnerability in…

Frequently asked

Is CVE-2026-52854 being actively exploited?

CVE-2026-52854 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.58%.

How severe is CVE-2026-52854?

CVE-2026-52854 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 0.58% probability of exploitation.

How do I fix CVE-2026-52854?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-52854 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.