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Vulnerability record · CVE-2024-33668 · published 26 April 2024

CVE-2024-33668: Zammad insecure direct object reference vulnerability

Zammad · Zammad

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.

9.1 CVSS 3.1 Critical EPSS 0.45% · top 63.6% CWE-639 · Insecure direct object reference
9.1CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
16 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://a7.de/fue/advisories/cve-2024-33668/
https://zammad.com/en/advisories/zaa-2024-02 Vendor Advisory
https://zammad.com/en/advisories/zaa-2024-02 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-48021Zammad vulnerabilityA vulnerability in Zammad v5.3.0 allows attackers to execute arbitrary code or escalate privileges via a crafted message sent to the server.EPSS 0.88%9.8CVE-2022-35490Zammad improper restriction of authentication attempts vulnerabilityZammad 5.2.0 is vulnerable to privilege escalation. Zammad has a prevention against brute-force attacks trying to guess login credentials. After a co…EPSS 0.87%9.8CVE-2021-42090Zammad deserialization of untrusted data vulnerabilityAn issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.EPSS 2.3%9.8CVE-2021-42094Zammad command injection vulnerabilityAn issue was discovered in Zammad before 4.1.1. Command Injection can occur via custom Packages.EPSS 1.9%9.8CVE-2020-26030Zammad improper authentication vulnerabilityAn issue was discovered in Zammad before 3.4.1. There is an authentication bypass in the SSO endpoint via a crafted header, when SSO is not configure…EPSS 1.4%9.8CVE-2017-5619Zammad improper authentication vulnerabilityAn issue was discovered in Zammad before 1.0.4, 1.1.x before 1.1.3, and 1.2.x before 1.2.1. Attackers can login with the hashed password itself (e.g.…EPSS 1.5%9.8CVE-2017-6080Zammad cross-site request forgery vulnerabilityAn issue was discovered in Zammad before 1.0.4, 1.1.x before 1.1.3, and 1.2.x before 1.2.1, caused by lack of a protection mechanism involving HTTP A…EPSS 0.73%9.1CVE-2022-27332Zammad missing authentication for critical function vulnerabilityAn access control issue in Zammad v5.0.3 allows attackers to write entries to the CTI caller log without authentication. This vulnerability can allow…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2024-33668), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.