MagicLink: Insecure Deserialization of MagicLink Actions Leads to Remote Code Execution

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Description MagicLink stores serialized action objects in the magiclinks.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 allowedclasses in unserialize(). Implementation includes a new Serializable security class with signing/verification, refactored getter/setter methods in MagicLink.

Published by the source

12 Feb 2026, 22:11 UTC

Last modified by the source

12 Feb 2026, 22:12 UTC

Source last checked

26 Oct 2026, 14:38 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-r33w-fg8j-9c94

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# Patch Next advisory brief: GHSA-r33w-fg8j-9c94

Advisory: MagicLink: Insecure Deserialization of MagicLink Actions Leads to Remote Code Execution
IDs: GHSA-r33w-fg8j-9c94
Record: https://patchnext.com/advisories/ghsa-r33w-fg8j-9c94 (revision 1, source checked 26 Oct 2026, 14:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: cesargb/laravel-magiclink 2.25.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist cesargb/laravel-magiclink: affected >= 2.0.0, < 2.25.1; fixed in 2.25.1

## Suggested inspection (read-only)
- Packagist cesargb/laravel-magiclink: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on cesargb/laravel-magiclink.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-r33w-fg8j-9c94 (GitHub-reviewed advisory GHSA-r33w-fg8j-9c94 lists affected ranges: Packagist cesargb/laravel-magiclink >=2.0.0 <2.25.1)

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