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[2.1] BBC didn't handlespecialchars properly #9780

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Merged
jdarwood007 merged 1 commit into from
Oct 17, 2026
+8 −4
Merged

[2.1] BBC didn't handlespecialchars properly #9780

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12 changes: 8 additions & 4 deletions Sources/Subs.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1764,6 +1764,10 @@ function parse_bbc($message, $smileys = true, $cache_id = '', $parse_tags = arra
$params['{display}'] = 'link';
}

foreach(['alt', 'width', 'height'] as $k) {
$params[$k] = $smcFunc['htmlspecialchars']($params[$k], ENT_QUOTES);
}

// Embedded file.
if ($params['{display}'] == 'embed')
{
Expand Down Expand Up @@ -2085,7 +2089,7 @@ function parse_bbc($message, $smileys = true, $cache_id = '', $parse_tags = arra
'height' => array('optional' => true, 'value' => ' height="$1"', 'match' => '(\d+)'),
),
'content' => '$1',
'validate' => function(&$tag, &$data, $disabled, $params)
'validate' => function(&$tag, &$data, $disabled, $params) use ($smcFunc)
{
$url = iri_to_url(strtr(trim($data), array('<br>' => '', ' ' => '%20')));

Expand All @@ -2094,8 +2098,8 @@ function parse_bbc($message, $smileys = true, $cache_id = '', $parse_tags = arra
else
$url = get_proxied_url($url);

$alt = !empty($params['{alt}']) ? ' alt="' . $params['{alt}']. '"' : ' alt=""';
$title = !empty($params['{title}']) ? ' title="' . $params['{title}']. '"' : '';
$alt = !empty($params['{alt}']) ? ' alt="' . $smcFunc['htmlspecialchars']($params['{alt}'], ENT_QUOTES). '"' : ' alt=""';
$title = !empty($params['{title}']) ? ' title="' . $smcFunc['htmlspecialchars']($params['{title}'], ENT_QUOTES). '"' : '';

$data = isset($disabled[$tag['tag']]) ? $url : '<img src="' . $url . '"' . $alt . $title . $params['{width}'] . $params['{height}'] . ' class="bbc_img' . (!empty($params['{width}']) || !empty($params['{height}']) ? ' resized' : '') . '" loading="lazy">';
},
Expand Down Expand Up @@ -3450,7 +3454,7 @@ function($matches) use ($schemes)
$params['{' . $key . '}'] = $matches[$i + 1];

// Just to make sure: replace any $ or { so they can't interpolate wrongly.
$params['{' . $key . '}'] = $smcFunc['htmlspecialchars'](strtr($params['{' . $key . '}'], array('$' => '&#036;', '{' => '&#123;')), ENT_QUOTES);
$params['{' . $key . '}'] = strtr($params['{' . $key . '}'], array('$' => '&#036;', '{' => '&#123;'));
}

foreach ($possible['parameters'] as $p => $info)
Expand Down
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