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<?php |
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/** |
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* @package FireBox |
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* @version 3.1.13 Free |
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* |
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* @author FirePlugins <info@fireplugins.com> |
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* @link https://www.fireplugins.com |
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* @copyright Copyright © 2026 FirePlugins All Rights Reserved |
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* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later |
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*/ |
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|
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namespace FireBox\Core\Helpers; |
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|
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if (!defined('ABSPATH')) |
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{ |
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exit; // Exit if accessed directly. |
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} |
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|
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/** |
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* Gatekeeper for the {fbExpr ...} shortcode, which evaluates JavaScript from campaign |
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* content in the visitor's browser. |
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* |
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* "{fbExpr ...}" is plain text, so kses passes it through untouched — it is the one way a |
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* user without unfiltered_html could smuggle executable JavaScript into a campaign. The |
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* feature is therefore limited to campaigns whose author holds that capability, which is |
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* the same bar WordPress applies to writing raw script anywhere else. |
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* |
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* The check is deliberately a plain function of the post author, with no stored state: |
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* an earlier version recorded the decision at save time and that machinery twice grew |
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* bugs of its own. The trade is documented — see docs/audits/security-audit.md F10. |
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*/ |
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class Expression |
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{ |
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/** |
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* Marker that switches the feature on for a campaign. |
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* |
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* @var string |
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*/ |
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const SHORTCODE_PREFIX = '{fbExpr'; |
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|
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/** |
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* Returns whether the given campaign may run expressions. |
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* |
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* @param int $post_id |
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* @param string $content |
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* |
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* @return bool |
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*/ |
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public static function isAllowedForCampaign($post_id, $content = '') |
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{ |
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// Nothing to run. |
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if (!is_string($content) || strpos($content, self::SHORTCODE_PREFIX) === false) |
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{ |
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return false; |
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} |
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|
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if (!self::isFeatureEnabled()) |
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{ |
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return false; |
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} |
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|
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$post_id = (int) $post_id; |
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|
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if (!$post_id) |
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{ |
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return false; |
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} |
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|
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$author_id = (int) get_post_field('post_author', $post_id); |
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|
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if (!$author_id) |
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{ |
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return false; |
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} |
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|
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return user_can($author_id, 'unfiltered_html'); |
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} |
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|
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/** |
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* Whether the feature is enabled site-wide. |
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* |
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* @return bool |
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*/ |
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public static function isFeatureEnabled() |
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{ |
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/** |
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* Allows a site to switch off JavaScript expressions entirely, regardless of who |
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* authored the campaign. |
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* |
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* @param bool $enabled |
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*/ |
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return (bool) apply_filters('firebox/expressions/enabled', true); |
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} |
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} |
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|
