GHSA-6PQ8-67PW-J6HW

Time-Based Information Disclosure Vulnerability in Flow

The PersistedUsernamePasswordProvider was prone to a information disclosure of account existance based on timing attacks as the hashing of passwords was only done in case an account was found. We changed the core so that the provider always does a password comparison in case credentials were submitted at all.

GHSA-6PQ8-67PW-J6HW has a CVSS score of 5.3 (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 (2.3.16, 3.0.10, 3.1.7, 3.2.7, 3.3.5); upgrading removes the vulnerable code path.

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1. What is GHSA-6PQ8-67PW-J6HW? GHSA-6PQ8-67PW-J6HW is a medium-severity security vulnerability in neos/flow (composer), affecting versions >= 2.3.0, < 2.3.16. It is fixed in 2.3.16, 3.0.10, 3.1.7, 3.2.7, 3.3.5.
2. How severe is GHSA-6PQ8-67PW-J6HW? GHSA-6PQ8-67PW-J6HW has a CVSS score of 5.3 (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 neos/flow are affected by GHSA-6PQ8-67PW-J6HW? neos/flow (composer) versions >= 2.3.0, < 2.3.16 is affected.
4. Is there a fix for GHSA-6PQ8-67PW-J6HW? Yes. GHSA-6PQ8-67PW-J6HW is fixed in 2.3.16, 3.0.10, 3.1.7, 3.2.7, 3.3.5. Upgrade to this version or later.
5. Is GHSA-6PQ8-67PW-J6HW exploitable, and should I be worried? Whether GHSA-6PQ8-67PW-J6HW 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 GHSA-6PQ8-67PW-J6HW 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 GHSA-6PQ8-67PW-J6HW?
   • Upgrade neos/flow to 2.3.16 or later
   • Upgrade neos/flow to 3.0.10 or later
   • Upgrade neos/flow to 3.1.7 or later
   • Upgrade neos/flow to 3.2.7 or later
   • Upgrade neos/flow to 3.3.5 or later

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