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MEDIUM severity

ZITADEL has improper HTML sanitization in emails and Console UIGHSA-v333-7h2p-5fhv

MEDIUMFix: zitadel/zitadel@0e1f99e

GHSA-v333-7h2p-5fhv is a medium-severity (CVSS 4.3) Cross-site Scripting (XSS) vulnerability in github.com/zitadel/zitadel. A fix is available for github.com/zitadel/zitadel — see the affected versions and patch details below.

Also known asCVE-2024-41953GO-2024-3015
Published
Updated
Affected
9 pkgs
Patched
9 / 9
Exploits
None indexed
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-v333-7h2p-5fhv.

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs51th percentile — riskier than 51% of all scored CVEsHighest risk
0.01%1.07%2.14%3.20%2.6%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

9 pkgs affected
🐹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 more

Real-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

9 total 9 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/zitadel/zitadel≥ 1.80.1&&< 2.52.32.52.3go get github.com/zitadel/zitadel@v2.52.3
🐹Gogithub.com/zitadel/zitadel≥ 2.53.0&&< 2.53.92.53.9go get github.com/zitadel/zitadel@v2.53.9
🐹Gogithub.com/zitadel/zitadel≥ 2.54.0&&< 2.54.82.54.8go get github.com/zitadel/zitadel@v2.54.8
🐹Gogithub.com/zitadel/zitadel≥ 2.55.0&&< 2.55.52.55.5go get github.com/zitadel/zitadel@v2.55.5
🐹Gogithub.com/zitadel/zitadel≥ 2.56.0&&< 2.56.22.56.2go get github.com/zitadel/zitadel@v2.56.2
🐹Gogithub.com/zitadel/zitadel≥ 2.57.0&&< 2.57.12.57.1go get github.com/zitadel/zitadel@v2.57.1

Affected Products

1 product · 9 configurations
Application
zitadelzitadel
≥ 2.56.0 && < 2.56.2
2 versions
2.57.02.58.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/zitadel/zitadel, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. 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.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### 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
O3 Security · Impact-Aware SCA

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ZITADEL has improper HTML sanitization in emails and…