Description

Grav is an open-source, flat-file content management system. A file upload path traversal vulnerability has been identified in the application prior to version 1.7.45, enabling attackers to replace or create files with extensions like .json, .zip, .css, .gif, etc. This critical security flaw poses severe risks, that can allow attackers to inject arbitrary code on the server, undermine integrity of backup files by overwriting existing files or creating new ones, and exfiltrate sensitive data using CSS exfiltration techniques. Upgrading to patched version 1.7.45 can mitigate the issue.

Classification

CVE ID: CVE-2024-27921

CVSS Base Severity: HIGH

CVSS Base Score: 8.8

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

Affected Products

Vendor: getgrav

Product: grav

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.15% (probability of being exploited)

EPSS Percentile: 36.26% (scored less or equal to compared to others)

EPSS Date: 2025-04-20 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: poc

SSVC Technical Impact: total

SSVC Automatable: false

References

https://nvd.nist.gov/vuln/detail/CVE-2024-27921
https://github.com/getgrav/grav/security/advisories/GHSA-m7hx-hw6h-mqmc
https://github.com/getgrav/grav/commit/5928411b86bab05afca2b33db4e7386a44858e99

Timeline