CVE-2026-103421

WPMobile.App <= 11.84 - Unauthenticated Stored Cross-Site Scripting via '/android_json/search/<value>/0' Path Segment

2026-10-02 17:42
Kevin Whelan

Strategic Overview

Status
Patched in 11.85
Affected Plugin
WPMobile.App – Android and iOS App Builder
Affected Version
<= 11.84
CVSS
5.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-103421
View all WPMobile.App – Android and iOS App Builder vulnerabilities

At a glance

CVE-2026-103421 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WPMobile.App WordPress plugin, affecting versions <= 11.84. It carries a CVSS score of 5.4 (reachable over the network). Exploitation requires no authentication. The issue is fixed in version 11.85; sites on affected versions should update now. Disclosed October 2026, reported by Kevin Whelan.

Vulnerability Overview

The WPMobile.App – Android and iOS App Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'REQUEST_URI (path segment after /android_json/search/)' parameter in all versions up to, and including, 11.84 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the app's content mode to be configured as 'webview' (i.e., the 'speed' option is not set to '1'), which is a supported and still-shipped mode, though no longer the default.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no privileges on the target site, and no interaction from a victim user.

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

WPMobile.App <= 11.84 carries this weakness at webview, and reaching it takes no account at all. 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 WPMobile.App the fix is 11.85: builds <= 11.84 are affected, anything from 11.85 onward is not.

Remediation

Update to version 11.85, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WPMobile.App 11.85 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-103421https://www.wordfence.com/threat-intel/vulnerabilities/id/0dc77221-836b-45cd-a234-19dbf28ed0e7https://nvd.nist.gov/vuln/detail/CVE-2026-103421

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C