Captivate Sync - Insecure deserialization

1.7

Low

Detected by

Fluid Attacks SAST Scanner

Disclosed by

Andres Roldan

Offensive Team, Fluid Attacks

Summary

Full name

Captivate Sync 3.0. - Insecure deserialization

Code name

State

Private

Release date

Mar 14, 2025

Affected product

Captivate Sync

Affected version(s)

Version 3.0.

Vulnerability name

Insecure deserialization

Remotely exploitable

No

CVSS v4.0 vector string

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U

CVSS v4.0 base score

1.7

Exploit available

No

Description

Captivate Sync 3.0. was found to be vulnerable. Unvalidated user input is used directly in an unserialize function in myapp/inc/class-captivate-sync-shortcode .php.

Vulnerability

Skims by Fluid Attacks discovered a Insecure deserialization in Captivate Sync 3.0.. The following is the output of the tool:

Skims output

 293 | public static function shortcode_loadmore() {
 294 |
 295 | $output = '';
 296 |
 297 | if ( ! isset( $_POST['_nonce'] ) || ! wp_verify_nonce( $_POST['_nonce'], '_cfm_front_nonce' ) ) {
 298 | $output = '<p><strong>ERROR:</strong> Something went wrong! Please refresh the page and try again.</p>';
 299 | }
 300 | else {
> 301 | $a = unserialize( base64_decode( $_POST['shortcode_atts'] ) );
 302 | $show_ids = ( '' != $a['show_id'] ) ? explode( ',', $a['show_id'] ) : array();
 303 | $episode_ids = ( '' != $a['episode_id'] ) ? explode( ',', $a['episode_id'] ) : array();
 304 |
 305 | if ( ! empty( $show_ids ) || ! empty( $episode_ids ) ) {
 306 |
 307 | $paged = sanitize_text_field( wp_unslash( $_POST['current_page'] ) );
 308 | $podcasts = ( ! empty( $episode_ids ) ) ? cfm_get_show_ids() : $show_ids;
 309 | $orderby = ( 'episodes' == $a['order'] ) ? 'post__in' : 'date';
 310 |
 311 | $get_episodes = array(
 312 | 'post_type' => 'captivate_podcast',
 313 | 'posts_per_page' => (int) $a['items'],
 314 | 'orderby' => $orderby,
 315 | 'order' => $a['order'],
 316 | 'post_status' => array( 'publish' ),
 317 | 'meta_query' => array(
 318 | array(
 319 | 'key' => 'cfm_show_id',
 320 | 'value' => $podcasts,
 321 | 'compare' => 'IN',
 322 | ),
 323 | array(
 324 | 'relation' => 'OR',
 325 | array(
 326 | 'key' => 'cfm_episode_website_active',
 327 | 'value' => '1',
 328 | 'compare' => '='
 329 | ),
 330 | array(
 331 | 'key' => 'cfm_episode_website_active',
 332 | 'compare' => 'NOT EXISTS',
 333 | )
 334 | )
 335 | ),
 336 | 'paged' => $paged,
 337 | );
 338 |
 339 | if ( ! empty( $episode_ids ) ) {
 340 | $get_episodes['post__in'] = $episode_ids;
 341 | }
 342 |
 343 | $episodes = new WP_Query( $get_episodes );
 344 |
 345 | if ( $episodes->have_posts() ) {
 346 |
 347 | $cfm_general_settings = get_option( 'cfm_general_settings' );
 348 | $season_episode_number_enable = isset( $cfm_general_settings['season_episode_number_enable'] ) ? $cfm_general_settin
 349 |
 350 | $layout_class = $a['layout'] == 'grid' ? 'cfm-episodes-grid' : 'cfm-episodes-list';
 351 | $column_class = $a['layout'] == 'grid' ? ' cfm-episodes-cols-' . $a['columns'] : '';
 352 |
 353 | // output style if at least one color is set.
 354 | if ( '' != $a['title_color'] || $a['title_hover_color'] || $a['link_text_color'] || $a['link_text_hover_color'] ) {
 355 | $output .= '<style>';
 356 | $output .= ( '' != $a['title_color'] ) ? '#cfm-episodes-' . $i . ' .cfm-episode-title a{color:' . sanitize_hex_col
 357 | $output .= ( '' != $a['title_hover_color'] ) ? '#cfm-episodes-' . $i . ' .cfm-episode-title a:hover{color:' . sani
 358 | $output .= ( '' != $a['link_text_color'] ) ? '#cfm-episodes-' . $i . ' .cfm-episode-link a {color:' . sanitize_hex
 359 | $output .= ( '' != $a['link_text_hover_color'] ) ? '#cfm-episodes-' . $i . ' .cfm-episode-link a:hover{color:' . s
 360 | $output .= '</style>';
 361 | }
 362 |
 363 | while ( $episodes->have_posts() ) :
 364 |
 365 | $episodes->the_post();
 366 | $post_id = get_the_ID();
 367 | $episode_title = get_the_title();
 368 | $featured_image_class = has_post_thumbnail( $post_id ) && ( $a['image'] == 'left' || $a['image'] == 'right' ) && $a
 369 | $player = '<div class=""cfm-episode-player"">' . cfm_captivate_player( $post_id ) . '</div>';
 370 |
 371 | $cfm_show_id = get_post_meta( $post_id, 'cfm_show_id', true );
 372 | $show_se_number_enable = cfm_get_show_info( $cfm_show_id, 'season_episode_number_enable' );
 373 |
 374 | // season and episode number.
 375 | if ( 'show' == $a['se_num'] && '1' != $season_episode_number_enable && '1' != $show_se_number_enable ) {
 376 | $episode_title = cfm_get_se_num_format( $post_id ) . get_the_title();
 377 | }
 378 |
 379 | // title tag.
 380 | $allowed_tags = array( 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'div', 'p');
 381 | $title_tag = in_array( $a['title_tag'], $allowed_tags ) ? $a['title_tag'] : 'h2';
 382 |
 383 | $output .= '<div class=""cfm-episode-wrap' . $featured_image_class . '"">';
 384 |
 385 | // featured image left container start.
 386 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'left' && $a['layout'] == 'list' )
 387 | $output .= '<div class=""cfm-episode-image-left""><div class=""cfm-episode-image""><a href=""' . get_permalink() . '"">
 388 |
 389 | // featured image left container end, content right start.
 390 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'left' && $a['layout'] == 'list' )
 391 | $output .= '</div><div class=""cfm-episode-content-right"">';
 392 |
 393 | // content left start.
 394 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'right' && $a['layout'] == 'list' )
 395 | $output .= '<div class=""cfm-episode-content-left"">';
 396 |
 397 | // featured image above title.
 398 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'above_title' )
 399 | $output .= '<div class=""cfm-episode-image""><a href=""' . get_permalink() . '"">' . get_the_post_thumbnail( $post_id
 400 |
 401 | // title.
 402 | if ( $a['title'] == 'show' )
 403 | $output .= '<div class=""cfm-episode-title""><' . $title_tag . '><a href=""' . get_permalink() . '"">' . $episode_tit
 404 |
 405 | // featured image below title.
 406 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'below_title' )
 407 | $output .= '<div class=""cfm-episode-image""><a href=""' . get_permalink() . '"">' . get_the_post_thumbnail( $post_id
 408 |
 409 | // player above content.
 410 | if ( $a['player'] == 'above_content' )
 411 | $output .= $player;
 412 |
 413 | // content excerpt.
 414 | if ( $a['content'] == 'excerpt' )
 415 | $output .= '<div class=""cfm-episode-content"">' . wp_trim_words( get_the_excerpt(), $a['content_length'], '...' )
 416 |
 417 | // content full text.
 418 | if ( $a['content'] == 'fulltext' )
 419 | $output .= '<div class=""cfm-episode-content"">' . get_the_content() . '</div>';
 420 |
 421 | // player below content.
 422 | if ( $a['player'] == 'below_content' )
 423 | $output .= $player;
 424 |
 425 | // permalink.
 426 | if ( $a['link'] == 'show' )
 427 | $output .= '<div class=""cfm-episode-link""><a href=""' . get_permalink() . '"">' . esc_html( $a['link_text'] ) . '</
 428 |
 429 | // content right end.
 430 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'left' && $a['layout'] == 'list' )
 431 | $output .= '</div>';
 432 |
 433 | // content left end, featured image right container start.
 434 | if ( has_post_thumbnail( $post_id ) && $a['image'] == 'right' && $a['layout'] == 'list' )
 435 | $output .= '</div><div class=""cfm-episode-image-right""><div class=""cfm-episode-image""><a href=""' . get_permalink(
 436 |
 437 | $output .= '</div>';
  438 |
  439 |      endwhile;
  440 |
  441 |      wp_reset_postdata();
  442 |
  443 |     }
  444 |     else {
  445 |      $output = 'no_more';
  446 |     }
  447 |
  448 |    }
  449 |    else {
  450 |     $output = 'nothing_found';
  451 |    }
  452 |
  453 |   }
  454 |
  455 |   echo $output;
  456 |
  457 |   wp_die();
  458 |
  459 |  }
      ^ Col 0

Our security policy

We have reserved the ID CVE-2025-31306 to refer to this issue from now on. Disclosure policy

System Information

  • Product: Captivate Sync

  • Version: 3.0.

Mitigation

There is currently no patch available for this vulnerability.

Timeline

Vulnerability discovered

Mar 14, 2025

Vendor contacted

Mar 14, 2025

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Fluid Attacks' solutions enable organizations to identify, prioritize, and remediate vulnerabilities in their software throughout the SDLC. Supported by AI, automated tools, and pentesters, Fluid Attacks accelerates companies' risk exposure mitigation and strengthens their cybersecurity posture.

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© 2025 Fluid Attacks. We hack your software.

Fluid Attacks' solutions enable organizations to identify, prioritize, and remediate vulnerabilities in their software throughout the SDLC. Supported by AI, automated tools, and pentesters, Fluid Attacks accelerates companies' risk exposure mitigation and strengthens their cybersecurity posture.

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