How severe is GHSA-ccrp-c664-8p4j?

No CVSS score has been assigned to GHSA-ccrp-c664-8p4j yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-ccrp-c664-8p4j?

GHSA-ccrp-c664-8p4j affects the following packages: markdown-to-jsx (npm). Ecosystems affected: npm.

How do I fix GHSA-ccrp-c664-8p4j?

Update markdown-to-jsx to 6.11.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-ccrp-c664-8p4j is resolved across your whole dependency graph.

How do I detect GHSA-ccrp-c664-8p4j in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for markdown-to-jsx. 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.

How do I mitigate GHSA-ccrp-c664-8p4j if there is no patch (or I can't update yet)?

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 does O3 Security protect against GHSA-ccrp-c664-8p4j?

O3 pinpoints whether GHSA-ccrp-c664-8p4j is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-ccrp-c664-8p4j actively exploited in the wild?

No public exploit code has been indexed for GHSA-ccrp-c664-8p4j yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-ccrp-c664-8p4j published, and has it been updated?

GHSA-ccrp-c664-8p4j was published on September 3, 2020 and was last updated on September 29, 2021. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

GHSA-ccrp-c664-8p4j

GHSA-ccrp-c664-8p4j is a security vulnerability in markdown-to-jsx. O3 Security confirms whether GHSA-ccrp-c664-8p4j is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Cross-Site Scripting in markdown-to-jsx

Published

Sep 3, 2020

Updated

Sep 29, 2021

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Blast Radius

1 pkg affected

Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.

markdown-to-jsxnpm

4.7Mdownloads / week

Description

Versions of markdown-to-jsx prior to 6.11.4 are vulnerable to Cross-Site Scripting. Due to insufficient input sanitization the package may render output containing malicious JavaScript. This vulnerability can be exploited through input of links containing data or VBScript URIs and a base64-encoded payload.

Recommendation

Upgrade to version 6.11.4 or later.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`markdown-to-jsx`	all versions	6.11.4

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for markdown-to-jsx. 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 markdown-to-jsx to 6.11.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-ccrp-c664-8p4j 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-ccrp-c664-8p4j 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-ccrp-c664-8p4j. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Versions of `markdown-to-jsx` prior to 6.11.4 are vulnerable to Cross-Site Scripting. Due to insufficient input sanitization the package may render output containing malicious JavaScript. This vulnerability can be exploited through input of links containing `data` or VBScript URIs and a base64-encoded payload. ## Recommendation Upgrade to version 6.11.4 or later.

O3 Security · Impact-Aware SCA

Is GHSA-ccrp-c664-8p4j in your dependencies?

O3 detects GHSA-ccrp-c664-8p4j across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works