CVE-2024-27927

RSSHub vulnerable to Server-Side Request Forgery

The attacker can send malicious requests to a RSSHub server, to make the server send HTTP GET requests to arbitrary destinations and see partial responses. This may lead to:

1. Leak the server IP address, which could be hidden behind a CDN.
2. Retrieve information in the internal network. e.g. which addresses/ports are accessible, the titles and meta descriptions of HTML pages.
3. DoS amplification. The attacker could request the server to download some large files, or chain several SSRF requests in a single attacker request: https://rsshub.a.com/zjol/paper/rsshub.b.net%2Fzjol%2Fpaper%2Frsshub.a.com%252Fzjol%252Fpaper%252Frsshub.b.net%25252Fzjol%25252Fpaper%25252Frsshub.a.com%2525252Fzjol%2525252Fpaper%2525252Fexample.com%2525252523%25252523%252523%2523%23.

Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.

CVE-2024-27927 has a CVSS score of 6.5 (Medium). The vector is network-reachable, no privileges required, and no user interaction. 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 (1.0.0-master.a429472); upgrading removes the vulnerable code path.

Kodem intelligence

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1. What is CVE-2024-27927? CVE-2024-27927 is a medium-severity server-side request forgery (SSRF) vulnerability in rsshub (npm), affecting versions < 1.0.0-master.a429472. It is fixed in 1.0.0-master.a429472. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
2. How severe is CVE-2024-27927? CVE-2024-27927 has a CVSS score of 6.5 (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.
3. Which versions of rsshub are affected by CVE-2024-27927? rsshub (npm) versions < 1.0.0-master.a429472 is affected.
4. Is there a fix for CVE-2024-27927? Yes. CVE-2024-27927 is fixed in 1.0.0-master.a429472. Upgrade to this version or later.
5. Is CVE-2024-27927 exploitable, and should I be worried? Whether CVE-2024-27927 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
6. What actually determines whether CVE-2024-27927 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.
7. How do I fix CVE-2024-27927? Upgrade rsshub to 1.0.0-master.a429472 or later.

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