Issues (4967)

Security Analysis    not enabled

This project does not seem to handle request data directly as such no vulnerable execution paths were found.

  Cross-Site Scripting
Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.
  File Exposure
File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.
  File Manipulation
File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.
  Object Injection
Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.
  Code Injection
Code Injection enables an attacker to execute arbitrary code on the server.
  Response Splitting
Response Splitting can be used to send arbitrary responses.
  File Inclusion
File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.
  Command Injection
Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.
  SQL Injection
SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.
  XPath Injection
XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.
  LDAP Injection
LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.
  Header Injection
  Other Vulnerability
This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.
  Regex Injection
Regex Injection enables an attacker to execute arbitrary code in your PHP process.
  XML Injection
XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.
  Variable Injection
Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.
Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

src/wp-includes/class-wp-embed.php (2 issues)

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1
<?php
2
/**
3
 * API for easily embedding rich media such as videos and images into content.
4
 *
5
 * @package WordPress
6
 * @subpackage Embed
7
 * @since 2.9.0
8
 */
9
class WP_Embed {
10
	public $handlers = array();
11
	public $post_ID;
12
	public $usecache = true;
13
	public $linkifunknown = true;
14
	public $last_attr = array();
15
	public $last_url = '';
16
17
	/**
18
	 * When a URL cannot be embedded, return false instead of returning a link
19
	 * or the URL.
20
	 *
21
	 * Bypasses the {@see 'embed_maybe_make_link'} filter.
22
	 *
23
	 * @access public
24
	 * @var bool
25
	 */
26
	public $return_false_on_fail = false;
27
28
	/**
29
	 * Constructor
30
	 */
31
	public function __construct() {
32
		// Hack to get the [embed] shortcode to run before wpautop()
33
		add_filter( 'the_content', array( $this, 'run_shortcode' ), 8 );
34
35
		// Shortcode placeholder for strip_shortcodes()
36
		add_shortcode( 'embed', '__return_false' );
37
38
		// Attempts to embed all URLs in a post
39
		add_filter( 'the_content', array( $this, 'autoembed' ), 8 );
40
41
		// After a post is saved, cache oEmbed items via Ajax
42
		add_action( 'edit_form_advanced', array( $this, 'maybe_run_ajax_cache' ) );
43
		add_action( 'edit_page_form', array( $this, 'maybe_run_ajax_cache' ) );
44
	}
45
46
	/**
47
	 * Process the [embed] shortcode.
48
	 *
49
	 * Since the [embed] shortcode needs to be run earlier than other shortcodes,
50
	 * this function removes all existing shortcodes, registers the [embed] shortcode,
51
	 * calls do_shortcode(), and then re-registers the old shortcodes.
52
	 *
53
	 * @global array $shortcode_tags
54
	 *
55
	 * @param string $content Content to parse
56
	 * @return string Content with shortcode parsed
57
	 */
58
	public function run_shortcode( $content ) {
59
		global $shortcode_tags;
60
61
		// Back up current registered shortcodes and clear them all out
62
		$orig_shortcode_tags = $shortcode_tags;
63
		remove_all_shortcodes();
64
65
		add_shortcode( 'embed', array( $this, 'shortcode' ) );
66
67
		// Do the shortcode (only the [embed] one is registered)
68
		$content = do_shortcode( $content, true );
69
70
		// Put the original shortcodes back
71
		$shortcode_tags = $orig_shortcode_tags;
72
73
		return $content;
74
	}
75
76
	/**
77
	 * If a post/page was saved, then output JavaScript to make
78
	 * an Ajax request that will call WP_Embed::cache_oembed().
79
	 */
80
	public function maybe_run_ajax_cache() {
81
		$post = get_post();
82
83
		if ( ! $post || empty( $_GET['message'] ) )
84
			return;
85
86
?>
87
<script type="text/javascript">
88
	jQuery(document).ready(function($){
89
		$.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post->ID, 'relative' ); ?>");
90
	});
91
</script>
92
<?php
93
	}
94
95
	/**
96
	 * Registers an embed handler.
97
	 *
98
	 * Do not use this function directly, use wp_embed_register_handler() instead.
99
	 *
100
	 * This function should probably also only be used for sites that do not support oEmbed.
101
	 *
102
	 * @param string $id An internal ID/name for the handler. Needs to be unique.
103
	 * @param string $regex The regex that will be used to see if this handler should be used for a URL.
104
	 * @param callable $callback The callback function that will be called if the regex is matched.
105
	 * @param int $priority Optional. Used to specify the order in which the registered handlers will be tested (default: 10). Lower numbers correspond with earlier testing, and handlers with the same priority are tested in the order in which they were added to the action.
106
	 */
107
	public function register_handler( $id, $regex, $callback, $priority = 10 ) {
108
		$this->handlers[$priority][$id] = array(
109
			'regex'    => $regex,
110
			'callback' => $callback,
111
		);
112
	}
113
114
	/**
115
	 * Unregisters a previously-registered embed handler.
116
	 *
117
	 * Do not use this function directly, use wp_embed_unregister_handler() instead.
118
	 *
119
	 * @param string $id The handler ID that should be removed.
120
	 * @param int $priority Optional. The priority of the handler to be removed (default: 10).
121
	 */
122
	public function unregister_handler( $id, $priority = 10 ) {
123
		unset( $this->handlers[ $priority ][ $id ] );
124
	}
125
126
	/**
127
	 * The do_shortcode() callback function.
128
	 *
129
	 * Attempts to convert a URL into embed HTML. Starts by checking the URL against the regex of
130
	 * the registered embed handlers. If none of the regex matches and it's enabled, then the URL
131
	 * will be given to the WP_oEmbed class.
132
	 *
133
	 * @param array $attr {
134
	 *     Shortcode attributes. Optional.
135
	 *
136
	 *     @type int $width  Width of the embed in pixels.
137
	 *     @type int $height Height of the embed in pixels.
138
	 * }
139
	 * @param string $url The URL attempting to be embedded.
140
	 * @return string|false The embed HTML on success, otherwise the original URL.
141
	 *                      `->maybe_make_link()` can return false on failure.
142
	 */
143
	public function shortcode( $attr, $url = '' ) {
144
		$post = get_post();
145
146
		if ( empty( $url ) && ! empty( $attr['src'] ) ) {
147
			$url = $attr['src'];
148
		}
149
150
		$this->last_url = $url;
151
152
		if ( empty( $url ) ) {
153
			$this->last_attr = $attr;
154
			return '';
155
		}
156
157
		$rawattr = $attr;
158
		$attr = wp_parse_args( $attr, wp_embed_defaults( $url ) );
159
160
		$this->last_attr = $attr;
161
162
		// kses converts & into &amp; and we need to undo this
163
		// See https://core.trac.wordpress.org/ticket/11311
164
		$url = str_replace( '&amp;', '&', $url );
165
166
		// Look for known internal handlers
167
		ksort( $this->handlers );
168
		foreach ( $this->handlers as $priority => $handlers ) {
169
			foreach ( $handlers as $id => $handler ) {
170
				if ( preg_match( $handler['regex'], $url, $matches ) && is_callable( $handler['callback'] ) ) {
171
					if ( false !== $return = call_user_func( $handler['callback'], $matches, $attr, $url, $rawattr ) )
172
						/**
173
						 * Filters the returned embed handler.
174
						 *
175
						 * @since 2.9.0
176
						 *
177
						 * @see WP_Embed::shortcode()
178
						 *
179
						 * @param mixed  $return The shortcode callback function to call.
180
						 * @param string $url    The attempted embed URL.
181
						 * @param array  $attr   An array of shortcode attributes.
182
						 */
183
						return apply_filters( 'embed_handler_html', $return, $url, $attr );
184
				}
185
			}
186
		}
187
188
		$post_ID = ( ! empty( $post->ID ) ) ? $post->ID : null;
189
		if ( ! empty( $this->post_ID ) ) // Potentially set by WP_Embed::cache_oembed()
190
			$post_ID = $this->post_ID;
191
192
		// Unknown URL format. Let oEmbed have a go.
193
		if ( $post_ID ) {
194
195
			// Check for a cached result (stored in the post meta)
196
			$key_suffix = md5( $url . serialize( $attr ) );
197
			$cachekey = '_oembed_' . $key_suffix;
198
			$cachekey_time = '_oembed_time_' . $key_suffix;
199
200
			/**
201
			 * Filters the oEmbed TTL value (time to live).
202
			 *
203
			 * @since 4.0.0
204
			 *
205
			 * @param int    $time    Time to live (in seconds).
206
			 * @param string $url     The attempted embed URL.
207
			 * @param array  $attr    An array of shortcode attributes.
208
			 * @param int    $post_ID Post ID.
209
			 */
210
			$ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, $url, $attr, $post_ID );
211
212
			$cache = get_post_meta( $post_ID, $cachekey, true );
213
			$cache_time = get_post_meta( $post_ID, $cachekey_time, true );
214
215
			if ( ! $cache_time ) {
216
				$cache_time = 0;
217
			}
218
219
			$cached_recently = ( time() - $cache_time ) < $ttl;
220
221
			if ( $this->usecache || $cached_recently ) {
222
				// Failures are cached. Serve one if we're using the cache.
223
				if ( '{{unknown}}' === $cache )
224
					return $this->maybe_make_link( $url );
225
226
				if ( ! empty( $cache ) ) {
227
					/**
228
					 * Filters the cached oEmbed HTML.
229
					 *
230
					 * @since 2.9.0
231
					 *
232
					 * @see WP_Embed::shortcode()
233
					 *
234
					 * @param mixed  $cache   The cached HTML result, stored in post meta.
235
					 * @param string $url     The attempted embed URL.
236
					 * @param array  $attr    An array of shortcode attributes.
237
					 * @param int    $post_ID Post ID.
238
					 */
239
					return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID );
240
				}
241
			}
242
243
			/**
244
			 * Filters whether to inspect the given URL for discoverable link tags.
245
			 *
246
			 * @since 2.9.0
247
			 * @since 4.4.0 The default value changed to true.
248
			 *
249
			 * @see WP_oEmbed::discover()
250
			 *
251
			 * @param bool $enable Whether to enable `<link>` tag discovery. Default true.
252
			 */
253
			$attr['discover'] = ( apply_filters( 'embed_oembed_discover', true ) );
254
255
			// Use oEmbed to get the HTML
256
			$html = wp_oembed_get( $url, $attr );
257
258
			// Maybe cache the result
259
			if ( $html ) {
0 ignored issues
show
Bug Best Practice introduced by
The expression $html of type false|string is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== false instead.

In PHP, under loose comparison (like ==, or !=, or switch conditions), values of different types might be equal.

For string values, the empty string '' is a special case, in particular the following results might be unexpected:

''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
Loading history...
260
				update_post_meta( $post_ID, $cachekey, $html );
261
				update_post_meta( $post_ID, $cachekey_time, time() );
262
			} elseif ( ! $cache ) {
263
				update_post_meta( $post_ID, $cachekey, '{{unknown}}' );
264
			}
265
266
			// If there was a result, return it
267
			if ( $html ) {
0 ignored issues
show
Bug Best Practice introduced by
The expression $html of type false|string is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== false instead.

In PHP, under loose comparison (like ==, or !=, or switch conditions), values of different types might be equal.

For string values, the empty string '' is a special case, in particular the following results might be unexpected:

''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
Loading history...
268
				/** This filter is documented in wp-includes/class-wp-embed.php */
269
				return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID );
270
			}
271
		}
272
273
		// Still unknown
274
		return $this->maybe_make_link( $url );
275
	}
276
277
	/**
278
	 * Delete all oEmbed caches. Unused by core as of 4.0.0.
279
	 *
280
	 * @param int $post_ID Post ID to delete the caches for.
281
	 */
282
	public function delete_oembed_caches( $post_ID ) {
283
		$post_metas = get_post_custom_keys( $post_ID );
284
		if ( empty($post_metas) )
285
			return;
286
287
		foreach ( $post_metas as $post_meta_key ) {
288
			if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) )
289
				delete_post_meta( $post_ID, $post_meta_key );
290
		}
291
	}
292
293
	/**
294
	 * Triggers a caching of all oEmbed results.
295
	 *
296
	 * @param int $post_ID Post ID to do the caching for.
297
	 */
298
	public function cache_oembed( $post_ID ) {
299
		$post = get_post( $post_ID );
300
301
		$post_types = get_post_types( array( 'show_ui' => true ) );
302
		/**
303
		 * Filters the array of post types to cache oEmbed results for.
304
		 *
305
		 * @since 2.9.0
306
		 *
307
		 * @param array $post_types Array of post types to cache oEmbed results for. Defaults to post types with `show_ui` set to true.
308
		 */
309
		if ( empty( $post->ID ) || ! in_array( $post->post_type, apply_filters( 'embed_cache_oembed_types', $post_types ) ) ){
310
			return;
311
		}
312
313
		// Trigger a caching
314
		if ( ! empty( $post->post_content ) ) {
315
			$this->post_ID = $post->ID;
316
			$this->usecache = false;
317
318
			$content = $this->run_shortcode( $post->post_content );
319
			$this->autoembed( $content );
320
321
			$this->usecache = true;
322
		}
323
	}
324
325
	/**
326
	 * Passes any unlinked URLs that are on their own line to WP_Embed::shortcode() for potential embedding.
327
	 *
328
	 * @see WP_Embed::autoembed_callback()
329
	 *
330
	 * @param string $content The content to be searched.
331
	 * @return string Potentially modified $content.
332
	 */
333
	public function autoembed( $content ) {
334
		// Replace line breaks from all HTML elements with placeholders.
335
		$content = wp_replace_in_html_tags( $content, array( "\n" => '<!-- wp-line-break -->' ) );
336
337
		if ( preg_match( '#(^|\s|>)https?://#i', $content ) ) {
338
			// Find URLs on their own line.
339
			$content = preg_replace_callback( '|^(\s*)(https?://[^\s<>"]+)(\s*)$|im', array( $this, 'autoembed_callback' ), $content );
340
			// Find URLs in their own paragraph.
341
			$content = preg_replace_callback( '|(<p(?: [^>]*)?>\s*)(https?://[^\s<>"]+)(\s*<\/p>)|i', array( $this, 'autoembed_callback' ), $content );
342
		}
343
344
		// Put the line breaks back.
345
		return str_replace( '<!-- wp-line-break -->', "\n", $content );
346
	}
347
348
	/**
349
	 * Callback function for WP_Embed::autoembed().
350
	 *
351
	 * @param array $match A regex match array.
352
	 * @return string The embed HTML on success, otherwise the original URL.
353
	 */
354
	public function autoembed_callback( $match ) {
355
		$oldval = $this->linkifunknown;
356
		$this->linkifunknown = false;
357
		$return = $this->shortcode( array(), $match[2] );
358
		$this->linkifunknown = $oldval;
359
360
		return $match[1] . $return . $match[3];
361
	}
362
363
	/**
364
	 * Conditionally makes a hyperlink based on an internal class variable.
365
	 *
366
	 * @param string $url URL to potentially be linked.
367
	 * @return false|string Linked URL or the original URL. False if 'return_false_on_fail' is true.
368
	 */
369
	public function maybe_make_link( $url ) {
370
		if ( $this->return_false_on_fail ) {
371
			return false;
372
		}
373
374
		$output = ( $this->linkifunknown ) ? '<a href="' . esc_url($url) . '">' . esc_html($url) . '</a>' : $url;
375
376
		/**
377
		 * Filters the returned, maybe-linked embed URL.
378
		 *
379
		 * @since 2.9.0
380
		 *
381
		 * @param string $output The linked or original URL.
382
		 * @param string $url    The original URL.
383
		 */
384
		return apply_filters( 'embed_maybe_make_link', $output, $url );
385
	}
386
}
387