What is CVE-2020-15156?

CVE-2020-15156 is a medium-severity cross-site request forgery (CSRF) vulnerability in nodebb-plugin-blog-comments (npm), affecting versions < 0.7.0. It is fixed in 0.7.0. A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones.

How severe is CVE-2020-15156?

CVE-2020-15156 has a CVSS score of 6.8 (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 nodebb-plugin-blog-comments are affected by CVE-2020-15156?

nodebb-plugin-blog-comments (npm) versions < 0.7.0 is affected.

Is there a fix for CVE-2020-15156?

Yes. CVE-2020-15156 is fixed in 0.7.0. Upgrade to this version or later.

Is CVE-2020-15156 exploitable, and should I be worried?

Whether CVE-2020-15156 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-2020-15156 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-2020-15156?

Upgrade nodebb-plugin-blog-comments to 0.7.0 or later.

CVE-2020-15156 in nodebb-plugin-blog-comments

Q: How severe is CVE-2020-15156?

CVE-2020-15156 has a CVSS score of 6.8 (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 nodebb-plugin-blog-comments are affected by CVE-2020-15156?

nodebb-plugin-blog-comments (npm) versions < 0.7.0 is affected.

Q: Is there a fix for CVE-2020-15156?

Yes. CVE-2020-15156 is fixed in 0.7.0. Upgrade to this version or later.

Q: Is CVE-2020-15156 exploitable, and should I be worried?

Whether CVE-2020-15156 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-2020-15156 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-2020-15156?

Upgrade nodebb-plugin-blog-comments to 0.7.0 or later.

Summary

XSS due to lack of CSRF validation for replying/publishing

Workarounds

You can cherry-pick the following commit: https://github.com/psychobunny/nodebb-plugin-blog-comments/commit/cf43beedb05131937ef46f365ab0a0c6fa6ac618

References

Visit https://community.nodebb.org if you have any questions about this issue or on how to patch / upgrade your instance.

Impact

Due to lack of CSRF validation, a logged in user is potentially vulnerable to an XSS attack which could allow a third party to post on their behalf on the forum.

A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones. Typical impact: state-changing actions performed as the victim without their consent.

CVE-2020-15156 has a CVSS score of 6.8 (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 (0.7.0); upgrading removes the vulnerable code path.

Affected versions

nodebb-plugin-blog-comments (< 0.7.0)

Security releases

nodebb-plugin-blog-comments → 0.7.0 (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.

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Remediation advice

Upgrade to the latest version v0.7.0

Frequently Asked Questions

What is CVE-2020-15156? CVE-2020-15156 is a medium-severity cross-site request forgery (CSRF) vulnerability in nodebb-plugin-blog-comments (npm), affecting versions < 0.7.0. It is fixed in 0.7.0. A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones.
How severe is CVE-2020-15156? CVE-2020-15156 has a CVSS score of 6.8 (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 nodebb-plugin-blog-comments are affected by CVE-2020-15156? nodebb-plugin-blog-comments (npm) versions < 0.7.0 is affected.
Is there a fix for CVE-2020-15156? Yes. CVE-2020-15156 is fixed in 0.7.0. Upgrade to this version or later.
Is CVE-2020-15156 exploitable, and should I be worried? Whether CVE-2020-15156 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-2020-15156 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-2020-15156? Upgrade nodebb-plugin-blog-comments to 0.7.0 or later.