Zammad security vulnerabilities

Zammad is a ticketing management software developed by the German company Zammad. Versions of Zammad prior to 7.0.1 and 6.5.4 contained security vulnerabilities. These vulnerabilities stemmed from the lack of authorization checks at the ticket creation endpoint, which could lead to security risks...

Zammad code issues and vulnerabilities

Zammad is a ticketing management software developed by the German company Zammad. Versions of Zammad prior to 7.0.1 and 6.5.4 contained code vulnerabilities. These vulnerabilities stemmed from the Webhook model’s lack of validation for loopback addresses, which could lead to the retrieval of...

CVE-2026-34719: Server-Side Request Forgery (SSRF)

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the webhook model was missing a proper validation for loop back addresses, or link-local addresses — only the URL scheme HTTP/HTTPS as well as the hostname was checked. This could end up in retrieving...

PT-2026-31417

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the SSO mechanism in Zammad was not verifying the header originates from a trusted SSO proxy/gateway before applying further actions on it. This vulnerability is fixed in 7.0.1 and 6.5.4...

Zammad access control vulnerability

Zammad is a ticketing management software developed by the German company Zammad. Versions of Zammad prior to 7.0.1 and 6.5.4 contained an access control vulnerability. This vulnerability stemmed from the SSO mechanism not verifying the source of headers, which could lead to security risks...

Zammad security vulnerabilities

Zammad is a ticketing management software developed by the German company Zammad. Versions of Zammad prior to 7.0.1 contained security vulnerabilities; these vulnerabilities were due to server-side template injection, which could potentially allow remote code execution through AI agents...

CVE-2026-34724: Improper Control of Generation of Code

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a server-side template injection vulnerability which leads to RCE via AI Agent exists. Impact is limited to environments where an attacker can control or influence typeenrichmentdata typically high-privilege...

CVE-2026-34722: Missing Authorization

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the used endpoint for ticket creation was missing authorization if the related parameter for adding links is used. This vulnerability is fixed in 7.0.1 and 6.5.4...

PT-2026-31420

Name of the Vulnerable Software and Affected Versions Zammad versions prior to 7.0.1 and prior to 6.5.4 Description Zammad, a web-based open-source helpdesk system, allowed unauthenticated remote attackers to access sensitive internal entity data through the getting started endpoint, even after...

Zammad access control vulnerability

Zammad is a ticketing management software developed by the German company Zammad. Versions of Zammad prior to 7.0.1 and 6.5.4 contained an access control vulnerability. This vulnerability stemmed from unverified attackers being able to access the “getting started” endpoint, potentially leading to...

CVE-2026-34723: Improper Access Control

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, unauthenticated remote attackers were able to access the getting started endpoint to get access to sensitive internal entity data, even after the system setup was completed. This vulnerability is fixed i...

PT-2026-31421

Name of the Vulnerable Software and Affected Versions Zammad versions prior to 7.0.1 Description Zammad is a web-based open-source helpdesk/customer support system. A server-side template injection vulnerability exists via the AI Agent, potentially leading to Remote Code Execution RCE. The impact...

CVE-2026-34721: Cross-Site Request Forgery (CSRF)

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the OAuth callback endpoints for Microsoft, Google, and Facebook external credentials do not validate a CSRF state parameter. This vulnerability is fixed in 7.0.1 and 6.5.4...

CVE-2023-50454

An issue was discovered in Zammad before 6.2.0. In several subsystems, SSL/TLS was used to establish connections to external services without proper validation of hostname and certificate authority. This is exploitable by man-in-the-middle attackers...

CVE-2023-50455

An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the "email address verification" feature, an attacker could send many requests for a known address to cause Denial Of Service generation of many emails, which would also spam the victim...

CVE-2018-1000154

Zammad GmbH Zammad version 2.3.0 and earlier contains a Improper Neutralization of Script-Related HTML Tags in a Web Page CWE-80 vulnerability in the subject of emails which are not html quoted in certain cases. This can result in the embedding and execution of java script code on users browser...

CVE-2022-35490

Zammad 5.2.0 is vulnerable to privilege escalation. Zammad has a prevention against brute-force attacks trying to guess login credentials. After a configurable amount of attempts, users are invalidated and logins prevented. An attacker might work around this prevention, enabling them to send more...

CVE-2022-35489

In Zammad 5.2.0, customers who have secondary organizations assigned were able to see all organizations of the system rather than only those to which they are assigned...

CVE-2022-35487

Zammad 5.2.0 suffers from Incorrect Access Control. Zammad did not correctly perform authorization on certain attachment endpoints. This could be abused by an unauthenticated attacker to gain access to attachments, such as emails or attached files...

CVE-2022-35488

In Zammad 5.2.0, an attacker could manipulate the rate limiting in the 'forgot password' feature of Zammad, and thereby send many requests for a known account to cause Denial Of Service by many generated emails which would also spam the victim...