What is GHSA-C8QJ-JX8J-FG2W?

GHSA-C8QJ-JX8J-FG2W is a critical-severity missing authorization vulnerability in DotVVM (nuget), affecting versions < 4.2.11. It is fixed in 4.2.11, 4.3.15, 5.0.0-preview09-final. The application does not perform an authorization check before performing a sensitive operation.

Which versions of DotVVM are affected by GHSA-C8QJ-JX8J-FG2W?

DotVVM (nuget) versions < 4.2.11 is affected.

Is there a fix for GHSA-C8QJ-JX8J-FG2W?

Yes. GHSA-C8QJ-JX8J-FG2W is fixed in 4.2.11, 4.3.15, 5.0.0-preview09-final. Upgrade to this version or later.

Is GHSA-C8QJ-JX8J-FG2W exploitable, and should I be worried?

Whether GHSA-C8QJ-JX8J-FG2W 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 GHSA-C8QJ-JX8J-FG2W 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 GHSA-C8QJ-JX8J-FG2W?

Upgrade: DotVVM to 4.2.11 or later, DotVVM to 4.3.15 or later, DotVVM to 5.0.0-preview09-final or later.

GHSA-C8QJ-JX8J-FG2W in DotVVM

Q: Which versions of DotVVM are affected by GHSA-C8QJ-JX8J-FG2W?

DotVVM (nuget) versions < 4.2.11 is affected.

Q: Is there a fix for GHSA-C8QJ-JX8J-FG2W?

Yes. GHSA-C8QJ-JX8J-FG2W is fixed in 4.2.11, 4.3.15, 5.0.0-preview09-final. Upgrade to this version or later.

Q: Is GHSA-C8QJ-JX8J-FG2W exploitable, and should I be worried?

Whether GHSA-C8QJ-JX8J-FG2W 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 GHSA-C8QJ-JX8J-FG2W 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 GHSA-C8QJ-JX8J-FG2W?

Upgrade: DotVVM to 4.2.11 or later, DotVVM to 4.3.15 or later, DotVVM to 5.0.0-preview09-final or later.

Summary

DotVVM: Missing authorization in AuthorizeActionFilter

Workarounds

As a workaround, you can use the AuthorizeAttribute instead. It implements the same interfaces (correctly). Note that is it deprecated for unrelated reasons, feel free to suppress the warning when using it as action filter.

Impact

All users of the AuthorizeActionFilter class are affected. The AuthorizeActionFilter simply does nothing, no “hacking” is needed to bypass the filter.

The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.

Affected versions

DotVVM (< 4.2.11) DotVVM (> 4.3.0-preview01-final, < 4.3.15) DotVVM (>= 5.0.0-preview01-final, < 5.0.0-preview09-final)

Security releases

DotVVM → 4.2.11 (nuget) DotVVM → 4.3.15 (nuget) DotVVM → 5.0.0-preview09-final (nuget)

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

DotVVM 4.3.15, 4.2.11 and 5.0.0-preview09 fix this.

Frequently Asked Questions

What is GHSA-C8QJ-JX8J-FG2W? GHSA-C8QJ-JX8J-FG2W is a critical-severity missing authorization vulnerability in DotVVM (nuget), affecting versions < 4.2.11. It is fixed in 4.2.11, 4.3.15, 5.0.0-preview09-final. The application does not perform an authorization check before performing a sensitive operation.
Which versions of DotVVM are affected by GHSA-C8QJ-JX8J-FG2W? DotVVM (nuget) versions < 4.2.11 is affected.
Is there a fix for GHSA-C8QJ-JX8J-FG2W? Yes. GHSA-C8QJ-JX8J-FG2W is fixed in 4.2.11, 4.3.15, 5.0.0-preview09-final. Upgrade to this version or later.
Is GHSA-C8QJ-JX8J-FG2W exploitable, and should I be worried? Whether GHSA-C8QJ-JX8J-FG2W 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 GHSA-C8QJ-JX8J-FG2W 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 GHSA-C8QJ-JX8J-FG2W?
- Upgrade DotVVM to 4.2.11 or later
- Upgrade DotVVM to 4.3.15 or later
- Upgrade DotVVM to 5.0.0-preview09-final or later

Other vulnerabilities in DotVVM

CVE-IDSeverityPackage summary

GHSA-2RM3-333W-XVC4MediumDotVVM: DotVVM: Unrestricted file upload GHSA-C2G3-C4GC-W5WGHighDotVVM: ReDoS in DotVVM routing GHSA-6Q65-J4JW-9CG8HighDotVVM: DotVVM allows path traversal when deployed in Debug mode