FreeScout

46 exploits Active since Mar 2024
CVE-2026-32753 WRITEUP HIGH WRITEUP
FreeScout: Stored XSS through SVG file upload with filter bypass
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. In versions 1.8.208 and below, bypasses of the attachment view logic and SVG sanitizer make it possible to upload and render an SVG that runs malicious JavaScript. An extension of .png with content type of image/svg+xml is allowed, and a fallback mechanism on invalid XML leads to unsafe sanitization. The application restricts which uploaded files are rendered inline: only files considered "safe" are displayed in the browser; others are served with Content-Disposition: attachment. This decision is based on two checks: the file extension (e.g. .png is allowed, while .svg may not be) and the declared Content-Type (e.g. image/* is allowed). By using a filename with an allowed extension (e.g. xss.png) and a Content-Type of image/svg+xml, an attacker can satisfy both checks and cause the server to treat the upload as a safe image and render it inline, even though the body is SVG and can contain scripted behavior. Any authenticated user can set up a specific URL, and whenever another user or administrator visits it, XSS can perform any action on their behalf. This issue has been fixed in version 1.8.209.
CVE-2026-32754 WRITEUP CRITICAL WRITEUP
FreeScout: Stored XSS via Unescaped Email Template Rendering ({!! $thread->body !!})
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Versions 1.8.208 and below are vulnerable to Stored Cross-Site Scripting (XSS) through FreeScout's email notification templates. Incoming email bodies are stored in the database without sanitization and rendered unescaped in outgoing email notifications using Blade's raw output syntax {!! $thread->body !!}. An unauthenticated attacker can exploit this vulnerability by simply sending an email, and when opened by any subscribed agent or admin as part of their normal workflow, enabling universal HTML injection (phishing, tracking) and, in vulnerable email clients, JavaScript execution (session hijacking, credential theft, account takeover) affecting all recipients simultaneously. This issue has been fixed in version 1.8.209.
CVSS 9.3
CVE-2026-28289 WRITEUP CRITICAL WRITEUP
FreeScout <=1.8.206 - Authenticated RCE
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A patch bypass vulnerability for CVE-2026-27636 in FreeScout 1.8.206 and earlier allows any authenticated user with file upload permissions to achieve Remote Code Execution (RCE) on the server by uploading a malicious .htaccess file using a zero-width space character prefix to bypass the security check. The vulnerability exists in the sanitizeUploadedFileName() function in app/Http/Helper.php. The function contains a Time-of-Check to Time-of-Use (TOCTOU) flaw where the dot-prefix check occurs before sanitization removes invisible characters. This vulnerability is fixed in 1.8.207.
CVSS 10.0
CVE-2026-27636 WRITEUP HIGH WRITEUP
FreeScout < 1.8.206 - Authenticated Remote Code Execution via .htaccess Upload
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.
CVSS 8.8
CVE-2026-27637 WRITEUP CRITICAL WRITEUP
FreeScout < 1.8.206 - Predictable Token Authentication Bypass via MD5 Token
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's `TokenAuth` middleware uses a predictable authentication token computed as `MD5(user_id + created_at + APP_KEY)`. This token is static (never expires/rotates), and if an attacker obtains the `APP_KEY` — a well-documented and common exposure vector in Laravel applications — they can compute a valid token for any user, including the administrator, achieving full account takeover without any password. This vulnerability can be exploited on its own or in combination with CVE-2026-27636. Version 1.8.206 fixes both vulnerabilities.
CVSS 9.8
CVE-2024-28186 WRITEUP HIGH WRITEUP
freescout < 1.8.124 - Sensitive Information Disclosure via Conversation Send Log Endpoint
FreeScout is an open source help desk and shared inbox built with PHP. A vulnerability has been identified in the Free Scout Application, which exposes SMTP server credentials used by an organization in the application to users of the application. This issue arises from the application storing complete stack traces of exceptions in its database. The sensitive information is then inadvertently disclosed to users via the `/conversation/ajax-html/send_log?folder_id=&thread_id={id}` endpoint. The stack trace reveals value of parameters, including the username and password, passed to the `Swift_Transport_Esmtp_Auth_LoginAuthenticator->authenticate()` function. Exploiting this vulnerability allows an attacker to gain unauthorized access to SMTP server credentials. With this sensitive information in hand, the attacker can potentially send unauthorized emails from the compromised SMTP server, posing a severe threat to the confidentiality and integrity of email communications. This could lead to targeted attacks on both the application users and the organization itself, compromising the security of email exchange servers. This issue has been addressed in version 1.8.124. Users are advised to upgrade. Users unable to upgrade should adopt the following measures: 1. Avoid Storing Complete Stack Traces, 2. Implement redaction mechanisms to filter and exclude sensitive information, and 3. Review and enhance the application's logging practices.
CVSS 7.1
CVE-2024-34697 WRITEUP HIGH WRITEUP
FreeScout < 1.8.139 - Unauthenticated Stored HTML Injection in Email Receival Module
FreeScout is a free, self-hosted help desk and shared mailbox. A stored HTML Injection vulnerability has been identified in the Email Receival Module of the Freescout Application. The vulnerability allows attackers to inject malicious HTML content into emails sent to the application's mailbox. This vulnerability arises from improper handling of HTML content within incoming emails, allowing attackers to embed malicious HTML code in the context of the application's domain. Unauthenticated attackers can exploit this vulnerability to inject malicious HTML content into emails. This could lead to various attacks such as form hijacking, application defacement, or data exfiltration via CSS injection. Although unauthenticated attackers are limited to HTML injection, the consequences can still be severe. Version 1.8.139 implements strict input validation and sanitization mechanisms to ensure that any HTML content received via emails is properly sanitized to prevent malicious HTML injections.
CVSS 7.6
CVE-2024-34698 WRITEUP MEDIUM WRITEUP
FreeScout < 1.8.139 - Prototype Pollution via getQueryParam Function
FreeScout is a free, self-hosted help desk and shared mailbox. Versions of FreeScout prior to 1.8.139 contain a Prototype Pollution vulnerability in the `/public/js/main.js` source file. The Prototype Pollution arises because the `getQueryParam` Function recursively merges an object containing user-controllable properties into an existing object (For URL Query Parameters Parsing), without first sanitizing the keys. This can allow an attacker to inject a property with a key `__proto__`, along with arbitrarily nested properties. The merge operation assigns the nested properties to the `params` object's prototype instead of the target object itself. As a result, the attacker can pollute the prototype with properties containing harmful values, which are then inherited by user-defined objects and subsequently used by the application dangerously. The vulnerability lets an attacker control properties of objects that would otherwise be inaccessible. If the application subsequently handles an attacker-controlled property in an unsafe way, this can potentially be chained with other vulnerabilities like DOM-based XSS, Open Redirection, Cookie Manipulation, Link Manipulation, HTML Injection, etc. Version 1.8.139 contains a patch for the issue.
CVSS 4.6
CVE-2025-48388 WRITEUP MEDIUM WRITEUP
FreeScout <1.8.178 - Code Injection
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.178, the application performs insufficient validation of user-supplied data, which is used as arguments to string formatting functions. As a result, an attacker can pass a string containing special symbols (\r, \n, \t)to the application. This issue has been patched in version 1.8.178.
CVSS 6.5
CVE-2025-48389 WRITEUP HIGH WRITEUP
FreeScout <1.8.178 - Deserialization
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.178, FreeScout is vulnerable to deserialization of untrusted data due to insufficient validation. Through the set function, a string with a serialized object can be passed, and when getting an option through the get method, deserialization will occur, which will allow arbitrary code execution This issue has been patched in version 1.8.178.
CVSS 7.2
CVE-2025-48390 WRITEUP HIGH WRITEUP
FreeScout <1.8.178 - Code Injection
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.178, FreeScout is vulnerable to code injection due to insufficient validation of user input in the php_path parameter. The backticks characters are not removed, as well as tabulation is not removed. When checking user input, the file_exists function is also called to check for the presence of such a file (folder) in the file system. A user with the administrator role can create a translation for the language, which will create a folder in the file system. Further in tools.php, the user can specify the path to this folder as php_path, which will lead to the execution of code in backticks. This issue has been patched in version 1.8.178.
CVSS 7.2
CVE-2025-48471 WRITEUP CRITICAL WRITEUP
freescout < 1.8.179 - Remote Code Execution via Unrestricted File Upload
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.179, the application does not check or performs insufficient checking of files uploaded to the application. This allows files to be uploaded with the phtml and phar extensions, which can lead to remote code execution if the Apache web server is used. This issue has been patched in version 1.8.179.
CVSS 9.8
CVE-2025-48472 WRITEUP HIGH WRITEUP
FreeScout <1.8.179 - Privilege Escalation
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.179, there is no check to ensure that the user is disabling notifications for the mailbox to which they already have access. Moreover, the code explicitly implements functionality that if the user does not have access to the mailbox, then after disabling (enabling) notifications for this mailbox, the user will gain access to it. This issue has been patched in version 1.8.179.
CVSS 8.1
CVE-2025-48473 WRITEUP MEDIUM WRITEUP
FreeScout <1.8.179 - Info Disclosure
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.179, when creating a conversation from a message in another conversation, there is no check to ensure that the user has the ability to view this message. Thus, the user can view arbitrary messages from other mailboxes or from other conversations to which they do not have access (access restriction to conversations is implemented by the show_only_assigned_conversations setting, which is also not checked). This issue has been patched in version 1.8.179.
CVSS 4.3
CVE-2025-48474 WRITEUP HIGH WRITEUP
freescout < 1.8.180 - Incorrect Authorization via Conversation Assignment
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.180, the application incorrectly checks user access rights for conversations. Users with show_only_assigned_conversations enabled can assign themselves to an arbitrary conversation from the mailbox to which they have access, thereby bypassing the restriction on viewing conversations. This issue has been patched in version 1.8.180.
CVSS 8.1
CVE-2025-48475 WRITEUP HIGH WRITEUP
FreeScout <1.8.180 - Info Disclosure
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.180, the System does not provide a check on which "clients" of the System an authorized user can view and edit, and which ones they cannot. As a result, an authorized user who does not have access to any of the existing mailboxes, as well as to any of the existing conversations, has the ability to view and edit the System's clients. The limitation of client visibility can be implemented by the limit_user_customer_visibility setting, however, in the specified scenarios, there is no check for the presence of this setting. This issue has been patched in version 1.8.180.
CVSS 8.1
CVE-2025-48478 WRITEUP MEDIUM WRITEUP
FreeScout <1.8.180 - Mass Assignment
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.180, insufficient input validation during user creation has resulted in a mass assignment vulnerability, allowing an attacker to manipulate all fields of the object, which are enumerated in the $fillable array (the User object), when creating a new user. This issue has been patched in version 1.8.180.
CVSS 4.9
CVE-2025-48875 WRITEUP MEDIUM WRITEUP
freescout < 1.8.181 - Stored Cross-Site Scripting via Profile Name Fields
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.181, the system's incorrect validation of last_name and first_name during profile data updates allows for the injection of arbitrary JavaScript code, which will be executed in a flesh-message when the data is deleted, potentially leading to a Cross-Site Scripting (XSS) vulnerability. This issue has been patched in version 1.8.181.
CVSS 5.4
CVE-2025-48880 WRITEUP MEDIUM WRITEUP
FreeScout <1.8.181 - Privilege Escalation
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.181, when an administrative account is a deleting a user, there is the the possibility of a race condition occurring. This issue has been patched in version 1.8.181.
CVSS 6.6
CVE-2025-54366 WRITEUP HIGH WRITEUP
freescout < 1.8.86 - Authenticated Remote Code Execution via Unsafe Deserialization in Helper::decrypt()
FreeScout is a lightweight free open source help desk and shared inbox built with PHP (Laravel framework). In versions 1.8.185 and below, there is a critical deserialization vulnerability in the /conversation/ajax endpoint that allows authenticated users with knowledge of the APP_KEY to achieve remote code execution. The vulnerability occurs when the application processes the attachments_all and attachments POST parameters through the insecure Helper::decrypt() function, which performs unsafe deserialization of user-controlled data without proper validation. This flaw enables attackers to create arbitrary objects and manipulate their properties, leading to complete compromise of the web application. This is fixed in version 1.8.186.
CVSS 8.8
CVE-2025-58163 WRITEUP HIGH WRITEUP
FreeScout < 1.8.186 - Authenticated Remote Code Execution via Untrusted Data Deserialization in Decrypt Function
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Versions 1.8.185 and earlier contain a deserialization of untrusted data vulnerability that allows authenticated attackers with knowledge of the application's APP_KEY to achieve remote code execution. The vulnerability is exploited via endpoint, e.g.: `/help/{mailbox_id}/auth/{customer_id}/{hash}/{timestamp}` where the `customer_id` and `timestamp` parameters are processed through the decrypt function in `app/Helper.php` without proper validation. The code decrypts using Laravel's built-in encryption functions, which subsequently deserialize the decrypted payload without sanitization, allowing attackers to craft malicious serialized PHP objects using classes to trigger arbitrary command execution. This is fixed in version 1.8.186.
CVSS 8.8