CVE-2021-24468

Leaflet Map <= 2.23.3 - Contributor+ Stored Cross-Site Scripting

2021-07-01 00:00

Strategic Overview

Status: Patched in 3.0.0
Affected Plugin: Leaflet Map
Affected Version: <= 2.23.3
CVSS: 6.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24468

At a glance

CVE-2021-24468 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Leaflet Map WordPress plugin, affecting versions <= 2.23.3. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 3.0.0; sites on affected versions should update now. Disclosed July 2021, reported by apple502j.

Vulnerability Overview

The Leaflet Map WordPress plugin before 3.0.0 does not escape some shortcode attributes before they are used in JavaScript code or HTML, which could allow users with a role as low as Contributors to exploit stored XSS issues

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Leaflet Map <= 2.23.3 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Leaflet Map the fix is 3.0.0: builds <= 2.23.3 are affected, anything from 3.0.0 onward is not.

Remediation

Update to version 3.0.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Leaflet Map: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Leaflet Map 3.0.0 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24468 https://www.wordfence.com/threat-intel/vulnerabilities/id/66dc7618-3d84-4a55-9bed-0f41415ed9e9 https://nvd.nist.gov/vuln/detail/CVE-2021-24468

Related records

Same weakness class

Other vulnerabilities in Leaflet Map

6.1CVE-2021-24467: Leaflet Map CSRF to Stored Cross-Site ScriptingCVE-2021-24467

CVSS Vector

6.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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