Summary
FOSUserBundle Entropy is lost in the TokenGenerator
Description
Because of the usage of base_convert which looses precision for large inputs, the entropy of tokens generated by FOSUserBundle for the email confirmation and password resetting is lost. This makes these tokens much less random than they are expected to be, and so not cryptographically safe.
Resolution
The token generation logic used in the 2.0.x branch based on base64 encoding has been backported. This changes the range of characters used in the token. Any route placeholder expected to match a token generated by FOSUserBundle must be updated to allow dashes, which are not allowed by \w in regexes. A \w+ requirement should so become [\w-]+.
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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Frequently Asked Questions
- What is GHSA-PJX8-984P-7P3X? GHSA-PJX8-984P-7P3X is a medium-severity security vulnerability in friendsofsymfony/user-bundle (composer), affecting versions >= 1.0.0, < 1.3.5. It is fixed in 1.3.5.
- Which versions of friendsofsymfony/user-bundle are affected by GHSA-PJX8-984P-7P3X? friendsofsymfony/user-bundle (composer) versions >= 1.0.0, < 1.3.5 is affected.
- Is there a fix for GHSA-PJX8-984P-7P3X? Yes. GHSA-PJX8-984P-7P3X is fixed in 1.3.5. Upgrade to this version or later.
- Is GHSA-PJX8-984P-7P3X exploitable, and should I be worried? Whether GHSA-PJX8-984P-7P3X 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-PJX8-984P-7P3X 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-PJX8-984P-7P3X? Upgrade
friendsofsymfony/user-bundleto 1.3.5 or later.