GHSA-v333-7h2p-5fhv
MEDIUMZITADEL has improper HTML sanitization in emails and Console UI
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadel+1 moreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Impact
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.
During investigation of this issue a related issue was found and mitigated, where on the user's detail page the username was 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.
Patches
2.x versions are fixed on >= 2.58.1 2.57.x versions are fixed on >= 2.57.1 2.56.x versions are fixed on >= 2.56.2 2.55.x versions are fixed on >= 2.55.5 2.54.x versions are fixed on >= 2.54.8 2.53.x versions are fixed on >= 2.53.9 2.52.x versions are fixed on >= 2.52.9
Workarounds
There is no workaround since a patch is already available.
Questions
If you have any questions or comments about this advisory, please email us at [email protected]
Credits
Thanks to Sushmita Poudel and David Underwood for reporting this.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/zitadel/zitadel | ≥ 1.80.1&&< 2.52.3 | 2.52.3 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.53.0&&< 2.53.9 | 2.53.9 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.54.0&&< 2.54.8 | 2.54.8 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.55.0&&< 2.55.5 | 2.55.5 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.56.0&&< 2.56.2 | 2.56.2 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.57.0&&< 2.57.1 | 2.57.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/zitadel/zitadel. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/zitadel/zitadel to 2.52.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-v333-7h2p-5fhv is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-v333-7h2p-5fhv is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-v333-7h2p-5fhv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-v333-7h2p-5fhv in your dependencies?
O3 detects GHSA-v333-7h2p-5fhv across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.