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CVE-2022-41442: fix: possible XSS vulnerability of $_POST · xiebruce/PicUploader@2b0411b

PicUploader v2.6.3 was discovered to contain cross-site scripting (XSS) vulnerability via the setStorageParams function in SettingController.php.

CVE
#xss#vulnerability#js#php

@@ -103,7 +103,11 @@ public function setStorageParams($params){

}

!is_dir($this->storagesDir) && mkdir($this->storagesDir, 0777);

$jsonFile = $this->storagesDir.’/storage-'.$key.’.json’;

$config = json_encode($_POST, JSON_UNESCAPED_SLASHES);

$post = [];

foreach($_POST as $key=>$val){

$post[$key] = htmlspecialchars($val);

}

$config = json_encode($post, JSON_UNESCAPED_SLASHES);

//在Win中,如果从"文件→属性→安全→对象名称"中复制路径,会多出一个你看不见的字符"\u202a",只有变成

//json后才看的见它的unicode,这样会导致路径明明存在程序却说不存在的情况,所以要把这个字符在json中去掉

$config = str_replace('\u202a’, '’, $config);

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