PCH Smart Linking: Escape API response fields

[vaurdan]

Description

This PR adds some additional escaping to the Content Suggestions API responses, when creating the Link_Suggestion object.

Motivation and context

Improve the security of the Parse.ly plugin.

How has this been tested?

Tested locally, by generating Smart Links on a test post. The output was the same, as expected.

Summary by CodeRabbit

• Security Updates
  • Enhanced security for content suggestions by sanitizing links, titles, and text to prevent potential vulnerabilities.

[coderabbitai]

Walkthrough

Walkthrough

The update focuses on enhancing the security of the get_links method in the class-suggest-linked-reference-api.php file by implementing proper sanitization for the href, title, and text properties of Link_Suggestion objects. This is achieved through the use of esc_url, esc_attr, and wp_kses_post functions, respectively, to prevent potential vulnerabilities such as Cross-Site Scripting (XSS).

Changes

File Path	Change Summary
.../content-suggestions/.../class-suggest-linked-reference-api.php	Sanitized href, title, and text properties of Link_Suggestion objects using corresponding WordPress sanitization functions.

Possibly related issues

• Discussion on Fixing the 'faultyEscapeUrl' Function to Prevent XSS Vulnerabilities #2345: The changes in this PR address the need for proper escaping to prevent XSS vulnerabilities, similar to the concerns raised in the issue about fixing the faultyEscapeUrl function. This suggests a shared objective of enhancing security, making it potentially related.

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Review Status

Actionable comments generated: 0

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Commits

Files that changed from the base of the PR and between 2980b79 and 79b9c2d.

Files selected for processing (1)

• src/RemoteAPI/content-suggestions/class-suggest-linked-reference-api.php (1 hunks)

Path instructions used (1)

src/RemoteAPI/content-suggestions/class-suggest-linked-reference-api.php (1)

**/*.{html,php}
Perform a detailed review of the provided code with following key aspects in mind:

• Review the HTML and PHP code to ensure it is well-structured and adheres to best practices.
• Ensure the code follows WordPress coding standards and is well-documented.
• Confirm the code is secure and free from vulnerabilities.
• Optimize the code for performance, removing any unnecessary elements.
• Validate comments for accuracy, currency, and adherence to WordPress coding standards.
• Ensure each line comment concludes with a period.
• Verify code compatibility with the latest version of WordPress, avoiding deprecated functions or features.

Additional comments (2)

src/RemoteAPI/content-suggestions/class-suggest-linked-reference-api.php (2)

• 78-80: The use of esc_url, esc_attr, and wp_kses_post for sanitizing the href, title, and text properties of Link_Suggestion objects is a solid approach to enhance security. These functions are appropriate for their respective contexts, aligning with WordPress coding standards for escaping and sanitizing output.
• 75-83: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [1-82]

Overall, the get_links method within the Suggest_Linked_Reference_API class is well-structured and adheres to WordPress coding standards. The documentation is clear, and the security enhancements made through the sanitization of external data are commendable. It's important to ensure that all external data interactions follow similar security practices to maintain the plugin's integrity.

[acicovic]

Thank you!