GHSA-j544-7q9p-6xp8 — werkzeug
HIGHGHSA-j544-7q9p-6xp8 is a high-severity (CVSS 7.5) Path Traversal vulnerability in werkzeug. 2 public exploit references exist, so weaponization risk is real. A fix is available for werkzeug — see the affected versions and patch details below.
Pallets Werkzeug vulnerable to Path Traversal
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.
How urgent is this, really
GHSA-j544-7q9p-6xp8 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE sits: patch-first territory.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
werkzeugReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
In Pallets Werkzeug before 0.15.5, SharedDataMiddleware mishandles drive names (such as C:) in Windows pathnames.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | werkzeug | all versions | 0.15.5pip install --upgrade 'werkzeug==0.15.5' |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Pallets Werkzeug 0.15.4 - Path Traversal
by faisalfs10x · Jul 6, 2021
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for werkzeug, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update werkzeug to 0.15.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j544-7q9p-6xp8 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-j544-7q9p-6xp8 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-j544-7q9p-6xp8. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
How to detect GHSA-j544-7q9p-6xp8
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-j544-7q9p-6xp8 -u https://target- Template
- Pallets Werkzeug <0.15.5 - Local File Inclusion
- Severity
- high
- Impact
- The LFI vulnerability can lead to unauthorized access to sensitive files, potential data leakage, and remote code execution.
- Remediation
- Upgrade Pallets Werkzeug to version 0.15.5 or above to mitigate the LFI vulnerability.
Template by ProjectDiscovery nuclei-templates (madrobot), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-j544-7q9p-6xp8 in your dependencies?
O3 Security finds GHSA-j544-7q9p-6xp8 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.