Vulnerability Description
Grav is a flat-file content management system. Prior to version 1.7.42, the patch for CVE-2022-2073, a server-side template injection vulnerability in Grav leveraging the default `filter()` function, did not block other built-in functions exposed by Twig's Core Extension that could be used to invoke arbitrary unsafe functions, thereby allowing for remote code execution. A patch in version 1.74.2 overrides the built-in Twig `map()` and `reduce()` filter functions in `system/src/Grav/Common/Twig/Extension/GravExtension.php` to validate the argument passed to the filter in `$arrow`.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Getgrav | Grav | < 1.7.42 |
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8PatchVendor Advisory
- https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8Vendor Advisory
- https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148Vendor Advisory
- https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/ExploitPatchThird Party Advisory
- https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeExploitMitigationVendor Advisory
- https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8PatchVendor Advisory
- https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8Vendor Advisory
- https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148Vendor Advisory
- https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/ExploitPatchThird Party Advisory
- https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeExploitMitigationVendor Advisory
FAQ
What is CVE-2023-34448?
CVE-2023-34448 is a vulnerability with a CVSS score of 8.8 (HIGH). Grav is a flat-file content management system. Prior to version 1.7.42, the patch for CVE-2022-2073, a server-side template injection vulnerability in Grav leveraging the default `filter()` function, ...
How severe is CVE-2023-34448?
CVE-2023-34448 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-34448?
Check the references section above for vendor advisories and patch information. Affected products include: Getgrav Grav.