Executive Summary

The Percent to Infograph plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its `percent_to_graph` shortcode. This vulnerability exists because the plugin does not properly sanitize or escape user-supplied attributes before outputting them. As a result, authenticated users with contributor-level access or higher can inject malicious scripts into pages. These scripts will execute whenever any user views the infected page.

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Impact Analysis

This vulnerability allows attackers with contributor-level access to inject arbitrary JavaScript into pages, which can then execute in the browsers of users who visit those pages. This can lead to theft of user credentials, session hijacking, defacement of the website, or distribution of malware. Because the attack is stored, the malicious script persists on the site and affects all visitors to the compromised page.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by identifying the presence of the Percent to Infograph WordPress plugin, especially versions up to and including 1.0, and by checking for usage of the `percent_to_graph` shortcode with potentially malicious or unexpected input values.'}, {'type': 'paragraph', 'content': 'Since the vulnerability involves stored cross-site scripting via shortcode attributes, detection can involve searching the WordPress database or content for injected scripts or suspicious shortcode usage.'}, {'type': 'list_item', 'content': "Search WordPress posts or pages for the shortcode usage: `grep -r '\\[percent_to_graph' /path/to/wordpress/wp-content`"}, {'type': 'list_item', 'content': 'Check the database for suspicious shortcode attributes containing script tags or JavaScript code, for example using SQL queries to find entries with `<script>` or `onerror=` in post content.'}, {'type': 'list_item', 'content': 'Use web application scanners or security plugins that detect stored XSS vulnerabilities in WordPress plugins.'}] [1]

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Mitigation Strategies

Immediate mitigation steps include removing or disabling the Percent to Infograph plugin if it is not essential.

If the plugin is required, restrict contributor-level and above users from adding or editing shortcodes until a patched version is available.

Review and sanitize existing content that uses the `percent_to_graph` shortcode to remove any injected scripts.

Apply any available updates or patches from the plugin author once released.

Implement additional security measures such as a Web Application Firewall (WAF) to block malicious script injections.

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