Zitadel is an open source identity management system. ZITADEL uses HTML for emails and renders certain information such as usernames dynamically. That information can be entered by users or administrators. Due to a missing output sanitization, these emails could include malicious code. This may potentially lead to a threat where an attacker, without privileges, could send out altered notifications that are part of the registration processes. An attacker could create a malicious link, where the injected code would be rendered as part of the email. On the user's detail page, the username was also not sanitized and would also render HTML, giving an attacker the same vulnerability. While it was possible to inject HTML including javascript, the execution of such scripts would be prevented by most email clients and the Content Security Policy in Console UI. This vulnerability is fixed in 2.58.1, 2.57.1, 2.56.2, 2.55.5, 2.54.8 2.53.9, and 2.52.3.
| Software | From | Fixed in |
|---|---|---|
github.com/zitadel/zitadel
|
2.52.0 | 2.52.3 |
github.com/zitadel/zitadel
|
2.53.0 | 2.53.9 |
github.com/zitadel/zitadel
|
2.54.0 | 2.54.8 |
github.com/zitadel/zitadel
|
2.55.0 | 2.55.5 |
github.com/zitadel/zitadel
|
2.56.0 | 2.56.2 |
github.com/zitadel/zitadel
|
2.57.0 | 2.57.0.x |
github.com/zitadel/zitadel
|
2.57.0 | 2.57.1 |
github.com/zitadel/zitadel
|
2.58.0 | 2.58.0.x |
github.com/zitadel/zitadel
|
2.58.0 | 2.58.1 |
| zitadel / zitadel | 2.56.0 | 2.56.2 |
| zitadel / zitadel | 2.55.0 | 2.55.5 |
| zitadel / zitadel | 2.54.0 | 2.54.8 |
| zitadel / zitadel | 2.53.0 | 2.53.9 |
| zitadel / zitadel | 2.58.0 | 2.58.0.x |
| zitadel / zitadel | 2.52.0 | 2.52.3 |
| zitadel / zitadel | 2.57.0 | 2.57.0.x |
| zitadel / zitadel | 2.57.0-rc1 | 2.57.0-rc1.x |
| zitadel / zitadel | 2.57.0-rc2 | 2.57.0-rc2.x |
A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.