Royal WordPress Backup & Restore Plugin <= 1.0.16 - Reflected Cross-Site Scripting via 'wpr_pending_template' Parameter
Strategic Overview
- Status
- Patched in 1.0.17
- Affected Version
<= 1.0.16- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2026-4305
At a glance
CVE-2026-4305 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Royal WordPress Backup, Restore & Migration Plugin WordPress plugin, affecting versions <= 1.0.16. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.0.17; sites on affected versions should update now. Disclosed April 2026, reported by Abi Wiranata.
Vulnerability Overview
The Royal WordPress Backup & Restore Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpr_pending_template' parameter in all versions up to, and including, 1.0.16 due to insufficient input validation. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an administrator 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 privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Royal WordPress Backup, Restore & Migration Plugin <= 1.0.16 carries this weakness at wpr_pending_template, 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. For Royal WordPress Backup, Restore & Migration Plugin the fix is 1.0.17: builds <= 1.0.16 are affected, anything from 1.0.17 onward is not.
Remediation
Update to version 1.0.17, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Royal WordPress Backup, Restore & Migration Plugin: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Royal WordPress Backup, Restore & Migration Plugin 1.0.17 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C