Showing URL in QR Code <= 0.0.1 - Cross-Site Request Forgery to Cross-Site Scripting
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- Showing URL in QR Code
- Affected Version
<= 0.0.1- CVSS
- 5.5Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2022-3847
At a glance
CVE-2022-3847 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Showing URL in QR Code WordPress plugin, affecting versions <= 0.0.1. It carries a CVSS score of 5.5 (reachable over the network; low attack complexity). No fixed release has been reported yet; treat installations running this software as exposed. Disclosed November 2022, reported by Kunal Sharma.
Vulnerability Overview
The Showing URL in QR Code plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 0.0.1. This is due to missing or incorrect nonce validation on the urlinqrcoed_menu_callback_func() function. This makes it possible for unauthenticated attackers to inject malicious JavaScript, that will execute whenever a user accesses an injected page, via forged request granted they can trick a site administrator or editor into performing an action such as clicking on a link.
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')
Showing URL in QR Code <= 0.0.1 carries this weakness at urlinqrcoed_menu_callback_func(), and reaching it 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. No fixed build of this plugin is recorded for Showing URL in QR Code yet, so installs running <= 0.0.1 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
How does WordSec protect against this?
The attempt arrives as an ordinary request to Showing URL in QR Code: WordSec's web application firewall inspects request payloads before WordPress loads them. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Firewall
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C