Critical vulnerability found in cron-utils

### Impact
A Template Injection was identified in cron-utils enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. Versions up to 9.1.2 are susceptible to this vulnerability. Please note, that only projects using the @Cron annotation to validate untrusted Cron expressions are affected.

### Patches
The issue was patched and a new version was released. Please upgrade to version 9.1.6.

### Workarounds
There are no known workarounds up to this moment.

### References
A description of the issue is provided in [issue 461](https://github.com/jmrozanec/cron-utils/issues/461)

### For more information
If you have any questions or comments about this advisory:

Open an issue in the [cron-utils Github repository](https://github.com/jmrozanec/cron-utils)

Vulnerability ID: GHSA-p9m8-27x8-rg87
Aliases: CVE-2021-41269
Published: 2021-11-15 23:27:11
CWE: CWE-94
Severity rating: CRITICAL
CVSS: type: CVSS_V3
score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected packages:
package: ecosystem: Maven
name: com.cronutils:cron-utils