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CriticalVulnerabilityCVE-2026-111406updated 25 Oct 2026, 15:20 UTC

MapSVG WordPress plugin lets attackers upload web shells

A flaw in this WordPress map plugin lets an outsider upload a hidden program to the website. Once that program is on the server, the attacker can run commands and take over the site.

Official, 2 sources
SeverityCriticalCVSS 9.9 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1AttackerSends a crafted upload request
  2. 2MapSVG pluginAccepts a dangerous file type
  3. 3Web serverStores the web shell on disk
  4. 4Web shellRuns commands sent by the attacker
  5. ResultAttacker controls the web server

What happened

Unrestricted file upload (CWE-434) in MapSVG (mapsvg-lite-interactive-vector-maps), allowing an attacker to upload a web shell to the web server. Affects all versions through 8.16.1.

Why it is dangerous: An attacker who uploads a web shell can control the web server, read or change site data, and use the site to attack visitors. Any site running the affected plugin is exposed.

Are you affected?

You are affected if your WordPress site runs the MapSVG plugin (mapsvg-lite-interactive-vector-maps) at version 8.16.1 or earlier.

MapSVG (mapsvg-lite-interactive-vector-maps): all versions through 8.16.1

What to do

  1. Check whether the MapSVG plugin is installed and what version it is
  2. Deactivate or remove the MapSVG plugin until a fixed version is confirmed
  3. Check the upload folders for unfamiliar PHP or script files and remove any you did not create
  4. Update to a fixed version as soon as the vendor releases one

Timeline

  1. 19 Oct 2026, 10:16 UTC
    Publicly disclosed
  2. 19 Oct 2026, 10:16 UTC
    Reported by NVD · NVD
  3. 25 Oct 2026, 15:20 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-111406 · GHSA-gj56-vq6p-72q4
CVSS
9.9 / 10
EPSS
0.3% chance of exploitation within 30 days
Disclosed
19 Oct 2026, 10:16 UTC
On Zero Radar
before the radar started
Last change
25 Oct 2026, 15:20 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

MapSVG WordPress plugin lets attackers upload web shells · Zero Radar