Twitter Cards Meta – Best Twitter Card Plugin for WordPress < 2.5.0 - Cross-Site Scripting
Strategic Overview
- Status
- Patched in 2.5.0
- Affected Plugin
- Twitter Cards Meta – Best Twitter Card Plugin for WordPress
- Affected Version
< 2.5.0- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2017-18503
At a glance
CVE-2017-18503 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Twitter Cards Meta WordPress plugin, affecting versions < 2.5.0. 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 2.5.0; sites on affected versions should update now. Disclosed April 2017.
Vulnerability Overview
The twitter-cards-meta plugin before 2.5.0 for WordPress has XSS via several parameters.
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')
Reaching this weakness in Twitter Cards Meta < 2.5.0 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 Twitter Cards Meta the fix is 2.5.0: builds < 2.5.0 are affected, anything from 2.5.0 onward is not.
Remediation
Update to version 2.5.0, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Twitter Cards Meta: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Twitter Cards Meta 2.5.0 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Twitter Cards Meta – Best Twitter Card Plugin for WordPress
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