GHSA-cp65-5m9r-vc2c
MEDIUMCamaleon CMS vulnerable to arbitrary path traversal (GHSL-2024-183)
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
camaleon_cmsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
A path traversal vulnerability accessible via MediaController's download_private_file method allows authenticated users to download any file on the web server Camaleon CMS is running on (depending on the file permissions).
In the download_private_file method:
def download_private_file
cama_uploader.enable_private_mode!
file = cama_uploader.fetch_file("private/#{params[:file]}")
send_file file, disposition: 'inline'
end
The file parameter is passed to the fetch_file method of the CamaleonCmsLocalUploader class (when files are uploaded locally):
def fetch_file(file_name)
raise ActionController::RoutingError, 'File not found' unless file_exists?(file_name)
file_name
end
If the file exists it's passed back to the download_private_file method where the file is sent to the user via send_file.
Proof of concept An authenticated user can download the /etc/passwd file by visiting an URL such as:
https://<camaleon-host>/admin/media/download_private_file?file=../../../../../../etc/passwd Impact This issue may lead to Information Disclosure.
Remediation Normalize file paths constructed from untrusted user input before using them and check that the resulting path is inside the targeted directory. Additionally, do not allow character sequences such as .. in untrusted input that is used to build paths.
See also:
CodeQL: Uncontrolled data used in path expression OWASP: Path Traversal
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | camaleon_cms | all versions | 2.8.1 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Camaleon CMS v2.9.0 - Path Traversal
by velampudisakshi · Apr 30, 2026
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for camaleon_cms. 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 camaleon_cms to 2.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-cp65-5m9r-vc2c 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-cp65-5m9r-vc2c 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-cp65-5m9r-vc2c. 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-cp65-5m9r-vc2c in your dependencies?
O3 detects GHSA-cp65-5m9r-vc2c across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.