Strategic Overview
- Status
- Patched in 0.99
- Affected Plugin
- WordPress Landing Page – Squeeze Page – Responsive Landing Page Builder Free – WP Lead Plus X
- Affected Version
<= 0.98- CVSS
- 7.2High
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2020-11509
At a glance
CVE-2020-11509 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WordPress Landing Page WordPress plugin, affecting versions <= 0.98. 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 0.99; sites on affected versions should update now. Disclosed April 2020, reported by Ram.
Vulnerability Overview
An XSS vulnerability in the WP Lead Plus X plugin through 0.98 for WordPress allows remote attackers to upload page templates containing arbitrary JavaScript via the c37_wpl_import_template admin-post action (which will execute in an administrator's browser if the template is used to create a page).
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 ('Cross-site Scripting')
Reaching this weakness in WordPress Landing Page <= 0.98 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 WordPress Landing Page the fix is 0.99: builds <= 0.98 are affected, anything from 0.99 onward is not.
Remediation
Update to version 0.99, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to WordPress Landing Page: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WordPress Landing Page 0.99 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in WordPress Landing Page – Squeeze Page – Responsive Landing Page Builder Free – WP Lead Plus X
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