Summary
Koel has SSRF through Authenticated Subsonic podcast feed URLs
Impact
An attacker with any valid Koel account and Subsonic API key can trigger server-side requests from the Koel host to loopback or internal network services. This can be used for blind SSRF against internal HTTP endpoints reachable by the Koel deployment. If an internal service returns valid RSS/XML or permissive CORS responses, parts of the response or final URL may be reflected back through normal podcast or stream behavior.
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.
GHSA-8Q6Q-M837-FV64 has a CVSS score of 6.4 (Medium). The vector is network-reachable, low 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 (9.7.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
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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See it in your environmentNew to Kodem? Get a demo →Remediation advice
Validate the podcast feed URL with the same safe URL policy before Poddle::fromUrl() performs any request. Re-validate every redirect target before following it, or disable automatic redirects and manually fetch only targets that pass the safe URL policy. Apply the same redirect validation in getStreamableUrl(). Add regression tests for direct loopback and private IP feed URLs, DNS names resolving to private ranges, and public URL to loopback redirects.
Frequently Asked Questions
- What is GHSA-8Q6Q-M837-FV64? GHSA-8Q6Q-M837-FV64 is a medium-severity server-side request forgery (SSRF) vulnerability in phanan/koel (composer), affecting versions <= 9.6.0. It is fixed in 9.7.0. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
- How severe is GHSA-8Q6Q-M837-FV64? GHSA-8Q6Q-M837-FV64 has a CVSS score of 6.4 (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 phanan/koel are affected by GHSA-8Q6Q-M837-FV64? phanan/koel (composer) versions <= 9.6.0 is affected.
- Is there a fix for GHSA-8Q6Q-M837-FV64? Yes. GHSA-8Q6Q-M837-FV64 is fixed in 9.7.0. Upgrade to this version or later.
- Is GHSA-8Q6Q-M837-FV64 exploitable, and should I be worried? Whether GHSA-8Q6Q-M837-FV64 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-8Q6Q-M837-FV64 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-8Q6Q-M837-FV64? Upgrade
phanan/koelto 9.7.0 or later.