With certain LDAP configurations, Zammad 5.0.1 was found to be vulnerable to unauthorized access with existing user accounts.

An issue was discovered in Zammad before 5.0.1. In some cases, there is improper enforcement of the privilege requirement for viewing a list of tickets that shows title, state, etc.

An issue was discovered in Zammad before 4.1.1. Command Injection can occur via custom Packages.

An issue was discovered in Zammad before 4.1.1. An admin can execute code on the server via a crafted request that manipulates triggers.

An issue was discovered in Zammad before 4.1.1. Stored XSS may occur via an Article during addition of an attachment to a Ticket.

An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.

An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.

An issue was discovered in Zammad before 4.1.1. The REST API discloses sensitive information.

An issue was discovered in Zammad before 4.1.1. The Chat functionality allows XSS because clipboard data is mishandled.

An issue was discovered in Zammad before 4.1.1. An admin can discover the application secret via the API.

An issue was discovered in Zammad before 4.1.1. An Agent account can modify account data, and gain admin access, via a crafted request.

An issue was discovered in Zammad before 4.1.1. There is stored XSS via a custom Avatar.

An issue was discovered in Zammad before 4.1.1. An attacker with valid agent credentials may send a series of crafted requests that cause an endless loop and thus cause denial of service.

Cross Site Scripting (XSS) in Zammad 1.0.x up to 4.0.0 allows remote attackers to execute arbitrary web script or HTML via the User Avatar attribute.

Incorrect Access Control for linked Tickets in Zammad 1.0.x up to 4.0.0 allows remote attackers to obtain sensitive information.

Incorrect Access Control in Zammad 1.0.x up to 4.0.0 allows remote attackers to obtain sensitive information via the Ticket Article detail view.

Text injection/Content Spoofing in 404 page in Zammad 1.0.x up to 4.0.0 could allow remote attackers to manipulate users into visiting the attackers' page.

Incorrect Access Control in Zammad 1.0.x up to 4.0.0 allows attackers to obtain sensitive information via email connection configuration probing.

Cross Site Scripting (XSS) in Zammad 1.0.x up to 4.0.0 allows remote attackers to execute arbitrary web script or HTML via multiple models that contain a 'note' field to store additional information.

An issue was discovered in Zammad before 3.5.1. A REST API call allows an attacker to change Ticket Article data in a way that defeats auditing.