GHSA-r33w-fg8j-9c94 — cesargb/laravel-magiclink
HIGHGHSA-r33w-fg8j-9c94 is a high-severity (CVSS 8.8) Deserialization of Untrusted Data vulnerability in cesargb/laravel-magiclink. A fix is available for cesargb/laravel-magiclink — see the affected versions and patch details below.
MagicLink: Insecure Deserialization of MagicLink Actions Leads to Remote Code Execution
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-r33w-fg8j-9c94.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-r33w-fg8j-9c94 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,333 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
cesargb/laravel-magiclinkReal-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
Description
MagicLink stores serialized action objects in the magic_links.action database column and deserializes them without integrity validation or class allowlisting in src/MagicLink.php and src/Actions/ResponseAction.php. An attacker with the ability to manipulate database records (e.g., via SQL injection or compromised admin access) could inject malicious serialized objects containing arbitrary closures, leading to Remote Code Execution (RCE) when the magic link is visited.
Resolution
The vulnerability has been mitigated through HMAC-signed serialization using the application key, class allowlisting restricted to ActionAbstract subclasses and framework classes, strict type validation preventing arbitrary object storage, and backward compatibility support for legacy data via allowed_classes in unserialize(). Implementation includes a new Serializable security class with signing/verification, refactored getter/setter methods in MagicLink.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | cesargb/laravel-magiclink | ≥ 2.0.0&&< 2.25.1 | 2.25.1composer require cesargb/laravel-magiclink:^2.25.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cesargb/laravel-magiclink, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update cesargb/laravel-magiclink to 2.25.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r33w-fg8j-9c94 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-r33w-fg8j-9c94 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-r33w-fg8j-9c94. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-r33w-fg8j-9c94 in your dependencies?
O3 Security finds GHSA-r33w-fg8j-9c94 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.