IMPress for IDX Broker <= 2.6.1 - Authenticated Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 2.6.2
- Affected Plugin
- IMPress for IDX Broker
- Affected Version
< 2.6.2- CVSS
- 5.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2020-11512
At a glance
CVE-2020-11512 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the IMPress for IDX Broker WordPress plugin, affecting versions < 2.6.2. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 2.6.2; sites on affected versions should update now. Disclosed March 2020, reported by Ram.
Vulnerability Overview
Stored XSS in the IMPress for IDX Broker WordPress plugin before 2.6.2 allows authenticated attackers with minimal (subscriber-level) permissions to save arbitrary JavaScript in the plugin's settings panel via the idx_update_recaptcha_key AJAX action and a crafted idx_recaptcha_site_key parameter, which would then be executed in the browser of any administrator visiting the panel. This could be used to create new administrator-level accounts.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in IMPress for IDX Broker < 2.6.2 takes any authenticated account. 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 IMPress for IDX Broker the fix is 2.6.2: builds < 2.6.2 are affected, anything from 2.6.2 onward is not.
Remediation
Update to version 2.6.2, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to IMPress for IDX Broker: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: IMPress for IDX Broker 2.6.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in IMPress for IDX Broker
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