GHSA-j422-qmxp-hv94
MEDIUMGrav vulnerable to Path Traversal allowing server files backup
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
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
A path traversal vulnerability has been identified in Grav CMS, versions 1.7.49.5 , allowing authenticated attackers
with administrative privileges to read arbitrary files on the underlying server filesystem. This vulnerability arises due
to insufficient input sanitization in the backup tool, where user-supplied paths are not properly restricted, enabling
access to files outside the intended webroot directory. The impact of this vulnerability depends on the privileges of
the user account running the application.
PoC
To accurately demonstrate the maximum potential impact of this vulnerability, the testing environment was configured in a specific way:
- Elevated Privileges: The application was run locally with the highest possible system privileges, operating under the **`root`** user account.
- Objective: This configuration was chosen to unequivocally show that the path traversal vulnerability is not just a theoretical issue but can lead to a complete compromise of the underlying host when combined with poor operational practices. The ability to read any file on the system is the ultimate test of the flaw's severity.
Proof of Concept Goal: Under these conditions, the subsequent PoC will exploit the vulnerability to read the SSH private key
of the `root` user (`/root/.ssh/id_rsa`). The successful exfiltration of this key represents a worst-case scenario, as it would provide
an attacker with persistent, undetectable, and complete administrative access to the host server. This highlights the critical intersection
of an application-layer vulnerability and a infrastructure-level misconfiguration.
1- LOGIN AS ADMIN AND GO TO : http://127.0.0.1/admin/tools/backups
2- Change 'Root Folder' to backup directory /../../../../../../../root/.ssh/
3- CLICK : 'SAVE'
4- CLICK : 'Backup Now'
5- Extract Backup :
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | getgrav/grav | all versions | 1.8.0-beta.27 |
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 1.8.0-beta.27 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j422-qmxp-hv94 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-j422-qmxp-hv94 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-j422-qmxp-hv94. 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-j422-qmxp-hv94 in your dependencies?
O3 detects GHSA-j422-qmxp-hv94 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.