Vulnerability Description
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, A Denial of Service (DoS) vulnerability has been identified in Grav related to the handling of scheduled_at parameters. Specifically, the application fails to properly sanitize input for cron expressions. By manipulating the scheduled_at parameter with a malicious input, such as a single quote, the application admin panel becomes non-functional, causing significant disruptions to administrative operations. The only way to recover from this issue is to manually access the host server and modify the backup.yaml file to correct the corrupted cron expression. This vulnerability is fixed in 1.8.0-beta.27.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Getgrav | Grav | < 1.8.0 |
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav/commit/9d11094e4133f059688fad1e00dbe96fb6e3ead7Patch
- https://github.com/getgrav/grav/security/advisories/GHSA-x62q-p736-3997ExploitThird Party Advisory
- https://github.com/getgrav/grav/security/advisories/GHSA-x62q-p736-3997ExploitThird Party Advisory
FAQ
What is CVE-2025-66303?
CVE-2025-66303 is a vulnerability with a CVSS score of 4.9 (MEDIUM). Grav is a file-based Web platform. Prior to 1.8.0-beta.27, A Denial of Service (DoS) vulnerability has been identified in Grav related to the handling of scheduled_at parameters. Specifically, the app...
How severe is CVE-2025-66303?
CVE-2025-66303 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66303?
Check the references section above for vendor advisories and patch information. Affected products include: Getgrav Grav.