RCE in Getgrav Grav
CVE-2023-34448
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`.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.045 (90.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Getgrav Grav — versions < 1.7.42
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Vendor Advisory)
- security-advisories@github.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, x_refsource_MISC, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-34448?
- CVE-2023-34448 is a high-severity vulnerability in Getgrav Grav, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2023-06-14.
- How severe is CVE-2023-34448?
- High severity. CVSS v3 base score is 8.8 out of 10.