CVE-2020-26034

An account-enumeration issue was discovered in Zammad before 3.4.1. The Create User functionality is implemented in a way that would enable an anonymous user to guess valid user email addresses. The application responds differently depending on whether the input supplied was recognized as associated with a valid user.

• https://zammad.com/news/security-advisory-zaa-2020-14Vendor Advisory
• https://zammad.com/news/security-advisory-zaa-2020-14Vendor Advisory

Published

Dec 28, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-26029An issue was discovered in Zammad before 3.4.1. There are wr…6.5
• CVE-2020-2603Vulnerability in the Oracle Field Service product of Oracle …6.1
• CVE-2020-26030An issue was discovered in Zammad before 3.4.1. There is an …9.8
• CVE-2020-26031An issue was discovered in Zammad before 3.4.1. The global-s…4.3
• CVE-2020-26032An SSRF issue was discovered in Zammad before 3.4.1. The SMS…7.5
• CVE-2020-26033An issue was discovered in Zammad before 3.4.1. The Tag and …5.4
• CVE-2020-26035An issue was discovered in Zammad before 3.4.1. There is Sto…5.4
• CVE-2020-26037Directory Traversal vulnerability in Server functionalty in …9.8
• CVE-2020-2604Vulnerability in the Java SE, Java SE Embedded product of Or…8.1
• CVE-2020-26041An issue was discovered in Hoosk CmS v1.8.0. There is an Rem…9.8
• CVE-2020-26042An issue was discovered in Hoosk CMS v1.8.0. There is a SQL …9.8
• CVE-2020-26043An issue was discovered in Hoosk CMS v1.8.0. There is a XSS …6.1