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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.045 (91.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.045 · newest: 0.045 · change: 0.000
Affected products
- Getgrav Grav — versions < 1.7.42
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8 (Vendor Advisory)
- github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8 (Patch, Vendor Advisory)
- github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php (Vendor Advisory)
- huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/ (Exploit, Patch, Third Party Advisory)
- www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83 (Exploit, 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.