Vulnerabilities (CVE)

Filtered by vendor Zammad Subscribe
Filtered by product Zammad
Total 90 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2024-36078 1 Zammad 1 Zammad 2026-06-17 N/A 6.7 MEDIUM
In Zammad before 6.3.1, a Ruby gem bundled by Zammad is installed with world-writable file permissions. This allowed a local attacker on the server to modify the gem's files, injecting arbitrary code into Zammad processes (which run with the environment and permissions of the Zammad user).
CVE-2024-33668 1 Zammad 1 Zammad 2026-06-17 N/A 9.1 CRITICAL
An issue was discovered in Zammad before 6.3.0. The Zammad Upload Cache uses insecure, partially guessable FormIDs to identify content. An attacker could try to brute force them to upload malicious content to article drafts they have no access to.
CVE-2024-33667 1 Zammad 1 Zammad 2026-06-17 N/A 6.5 MEDIUM
An issue was discovered in Zammad before 6.3.0. An authenticated agent could perform a remote Denial of Service attack by calling an endpoint that accepts a generic method name, which was not properly sanitized against an allowlist.
CVE-2024-33666 1 Zammad 1 Zammad 2026-06-17 N/A 8.6 HIGH
An issue was discovered in Zammad before 6.3.0. Users with customer access to a ticket could have accessed time accounting details of this ticket via the API. This data should be available only to agents.
CVE-2023-50457 1 Zammad 1 Zammad 2026-06-17 N/A 4.3 MEDIUM
An issue was discovered in Zammad before 6.2.0. When listing tickets linked to a knowledge base answer, or knowledge base answers of a ticket, a user could see entries for which they lack permissions.
CVE-2023-50456 1 Zammad 1 Zammad 2026-06-17 N/A 5.3 MEDIUM
An issue was discovered in Zammad before 6.2.0. An attacker can trigger phishing links in generated notification emails via a crafted first or last name.
CVE-2023-50455 1 Zammad 1 Zammad 2026-06-17 N/A 7.5 HIGH
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-2023-50454 1 Zammad 1 Zammad 2026-06-17 N/A 5.9 MEDIUM
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-2023-50453 1 Zammad 1 Zammad 2026-06-17 N/A 5.3 MEDIUM
An issue was discovered in Zammad before 6.2.0. It uses the public endpoint /api/v1/signshow for its login screen. This endpoint returns internal configuration data of user object attributes, such as selectable values, which should not be visible to the public.
CVE-2023-31597 1 Zammad 1 Zammad 2026-06-17 N/A 6.5 MEDIUM
An issue in Zammad v5.4.0 allows attackers to bypass e-mail verification using an arbitrary address and manipulate the data of the generated user. Attackers are also able to gain unauthorized access to existing tickets.
CVE-2023-29868 1 Zammad 1 Zammad 2026-06-17 N/A 6.5 MEDIUM
Zammad 5.3.x (Fixed in 5.4.0) is vulnerable to Incorrect Access Control. An authenticated attacker with agent and customer roles could perform unauthorized changes on articles where they only have customer permissions.
CVE-2023-29867 1 Zammad 1 Zammad 2026-06-17 N/A 6.5 MEDIUM
Zammad 5.3.x (Fixed 5.4.0) is vulnerable to Incorrect Access Control. An authenticated attacker could gain information about linked accounts of users involved in their tickets using the Zammad API.
CVE-2022-48023 1 Zammad 1 Zammad 2026-06-17 N/A 4.3 MEDIUM
Insufficient privilege verification in Zammad v5.3.0 allows an authenticated attacker to perform changes on the tags of their customer tickets using the Zammad API. This is now corrected in v5.3.1 so that only agents with write permissions may change ticket tags.
CVE-2022-48022 1 Zammad 1 Zammad 2026-06-17 N/A 4.3 MEDIUM
An issue in the component /api/v1/mentions of Zammad v5.3.0 allows authenticated attackers with agent permissions to view information about tickets they are not authorized to see.
CVE-2022-48021 1 Zammad 1 Zammad 2026-06-17 N/A 9.8 CRITICAL
A vulnerability in Zammad v5.3.0 allows attackers to execute arbitrary code or escalate privileges via a crafted message sent to the server.
CVE-2022-40817 1 Zammad 1 Zammad 2026-06-17 N/A 4.3 MEDIUM
Zammad 5.2.1 has a fine-grained permission model that allows to configure read-only access to tickets. However, agents were still wrongly able to perform some operations on such tickets, like adding and removing links, tags. and related answers. This issue has been fixed in 5.2.2.
CVE-2022-40816 1 Zammad 1 Zammad 2026-06-17 N/A 6.5 MEDIUM
Zammad 5.2.1 is vulnerable to Incorrect Access Control. Zammad's asset handling mechanism has logic to ensure that customer users are not able to see personal information of other users. This logic was not effective when used through a web socket connection, so that a logged-in attacker would be able to fetch personal data of other users by querying the Zammad API. This issue is fixed in , 5.2.2.
CVE-2022-35490 1 Zammad 1 Zammad 2026-06-17 N/A 9.8 CRITICAL
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 than the configured amount of requests before the user invalidation takes place.
CVE-2022-35489 1 Zammad 1 Zammad 2026-06-17 N/A 6.5 MEDIUM
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-2022-35488 1 Zammad 1 Zammad 2026-06-17 N/A 7.5 HIGH
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.