CVE-2026-12424

ARforms <= 7.2.4 - Unauthenticated Stored Cross-Site Scripting via Referer Header

2026-11-10 19:05
Huynh Pham Thanh Luc

Strategic Overview

Status
Patched in 7.3
Affected Plugin
ARforms
Affected Version
<= 7.2.4
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation
CVE
CVE-2026-12424
View all ARforms vulnerabilities

At a glance

CVE-2026-12424 is a high-severity Improper Neutralization of Input During Web Page Generation vulnerability in the ARforms WordPress plugin, affecting versions <= 7.2.4. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 7.3; sites on affected versions should update now. Disclosed November 2026, reported by Huynh Pham Thanh Luc.

Vulnerability Overview

The ARforms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Referer Header in all versions up to, and including, 7.2.4 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. The arf_save_incomplete_form_data() AJAX handler is registered with wp_ajax_nopriv_, meaning unauthenticated attackers can store a malicious payload by submitting a partial form entry with a forged Referer header, with no authentication required at any step.

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 privileges on the target site, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation

ARforms <= 7.2.4 carries this weakness at arf_save_incomplete_form_data(), 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 ARforms the fix is 7.3: builds <= 7.2.4 are affected, anything from 7.3 onward is not.

Remediation

Update to version 7.3, 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: ARforms 7.3 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-2026-12424https://www.wordfence.com/threat-intel/vulnerabilities/id/23a50221-af0c-46e6-94d5-1d07f6b6fb01https://nvd.nist.gov/vuln/detail/CVE-2026-12424

Related records

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