What is CVE-2019-14772?

CVE-2019-14772 is a medium-severity cross-site scripting (XSS) vulnerability in verdaccio (npm), affecting versions < 3.12.0. It is fixed in 3.12.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.

How severe is CVE-2019-14772?

CVE-2019-14772 has a CVSS score of 6.1 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of verdaccio are affected by CVE-2019-14772?

verdaccio (npm) versions < 3.12.0 is affected.

Is there a fix for CVE-2019-14772?

Yes. CVE-2019-14772 is fixed in 3.12.0. Upgrade to this version or later.

Is CVE-2019-14772 exploitable, and should I be worried?

Whether CVE-2019-14772 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2019-14772 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

How do I fix CVE-2019-14772?

Upgrade verdaccio to 3.12.0 or later.

CVE-2019-14772 in verdaccio

Q: How severe is CVE-2019-14772?

CVE-2019-14772 has a CVSS score of 6.1 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of verdaccio are affected by CVE-2019-14772?

verdaccio (npm) versions < 3.12.0 is affected.

Q: Is there a fix for CVE-2019-14772?

Yes. CVE-2019-14772 is fixed in 3.12.0. Upgrade to this version or later.

Q: Is CVE-2019-14772 exploitable, and should I be worried?

Whether CVE-2019-14772 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2019-14772 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2019-14772?

Upgrade verdaccio to 3.12.0 or later.

Summary

Cross-Site Scripting (XSS) in Verdaccio

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

No, the users must update.

References

Are there any links users can visit to find out more?

https://www.npmjs.com/advisories/832
https://www.npmjs.com/advisories/833

The issue was reported by the NPMJS Security Team

For more information

If you have any questions or comments about this advisory:

Read the Security Policy to find the ways to be in contact with us.

Impact

What kind of vulnerability is it? Who is impacted?

Cross-Site Scripting XSS, malicious packages with content Javascript that might be executed in the User Interface stealing user credentials.

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2019-14772 has a CVSS score of 6.1 (Medium). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.12.0); upgrading removes the vulnerable code path.

Affected versions

verdaccio (< 3.12.0)

Security releases

verdaccio → 3.12.0 (npm)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

Already deployed Kodem?

See it in your environment New to Kodem? Get a demo →

Remediation advice

Has the problem been patched? What versions should users upgrade to?

Users that still using v3 must upgrade to >3.12.0 or those have no problem to migrate to a major version >=4.0.0 also fix the issue.

Frequently Asked Questions

What is CVE-2019-14772? CVE-2019-14772 is a medium-severity cross-site scripting (XSS) vulnerability in verdaccio (npm), affecting versions < 3.12.0. It is fixed in 3.12.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
How severe is CVE-2019-14772? CVE-2019-14772 has a CVSS score of 6.1 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of verdaccio are affected by CVE-2019-14772? verdaccio (npm) versions < 3.12.0 is affected.
Is there a fix for CVE-2019-14772? Yes. CVE-2019-14772 is fixed in 3.12.0. Upgrade to this version or later.
Is CVE-2019-14772 exploitable, and should I be worried? Whether CVE-2019-14772 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2019-14772 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2019-14772? Upgrade verdaccio to 3.12.0 or later.