CVE-2019-15521 is a critical-severity (CVSS 9.8) Deserialization of Untrusted Data vulnerability in spoon/library. A fix is available for spoon/library — see the affected versions and patch details below.
Spoon Library as used in Fork CMS allows PHP object injection
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
spoon/libraryReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Spoon Library through 2014-02-06, as used in Fork CMS before 1.4.1 and other products, allows PHP object injection via a cookie containing an object.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | spoon/library | all versions | 1.4.1composer require spoon/library:^1.4.1 |
Affected Products
fork cmsfork-cmsspoon libraryspoon-libraryDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for spoon/library, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update spoon/library to 1.4.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-15521 is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.
Frequently Asked Questions
Is CVE-2019-15521 in your dependencies?
Find it across Packagist, including transitive dependencies.