Debug Meta Data <= 1.1.2 - Stored Cross-Site Scripting
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- Debug Meta Data
- Affected Version
<= 1.1.2- CVSS
- 5.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2020-27356
At a glance
CVE-2020-27356 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Debug Meta Data WordPress plugin, affecting versions <= 1.1.2. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). No fixed release has been reported yet; treat installations running this software as exposed. Disclosed October 2020, reported by Chuck Gabriele, Mandiant.
Vulnerability Overview
The Debug Meta Data plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 1.1.2 due to insufficient input sanitization and output escaping on the a user's user-agent HTTP header value. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected 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.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in Debug Meta Data <= 1.1.2 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 Debug Meta Data yet, so installs running <= 1.1.2 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 Debug Meta Data: 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