Summary
Insecure Unserialize Vulnerability in FLOW3
Due to a missing signature (HMAC) for a request argument, an attacker could unserialize arbitrary objects within FLOW3.
To our knowledge it is neither possible to inject code through this vulnerability, nor are there exploitable objects within the FLOW3 Base Distribution. However, there might be exploitable objects within user applications.
Impact
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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Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is GHSA-M2HP-5X78-74MG? GHSA-M2HP-5X78-74MG is a medium-severity security vulnerability in typo3/flow (composer), affecting versions >= 1.0.0, < 1.0.4. It is fixed in 1.0.4.
- Which versions of typo3/flow are affected by GHSA-M2HP-5X78-74MG? typo3/flow (composer) versions >= 1.0.0, < 1.0.4 is affected.
- Is there a fix for GHSA-M2HP-5X78-74MG? Yes. GHSA-M2HP-5X78-74MG is fixed in 1.0.4. Upgrade to this version or later.
- Is GHSA-M2HP-5X78-74MG exploitable, and should I be worried? Whether GHSA-M2HP-5X78-74MG 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-M2HP-5X78-74MG 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-M2HP-5X78-74MG? Upgrade
typo3/flowto 1.0.4 or later.