GHSA-w9f3-qc75-qgx9
CRITICALGHSA-w9f3-qc75-qgx9 is a critical-severity (CVSS 9.3) vulnerability in prestashop/prestashop. O3 Security confirms whether GHSA-w9f3-qc75-qgx9 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
PrestaShop has a stored XSS executable in customer service view
Blast Radius
prestashop/prestashop🐘prestashop/prestashopReal-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
Impact
This is a stored Cross-site Scripting (XSS) vulnerability in the PrestaShop back-office Customer Service view.
An unauthenticated attacker can submit the public Contact Us form with a malicious email address. The payload is stored in the database and executed when a back-office employee opens the affected customer thread, enabling session hijacking and full back-office takeover.
Patches
Patched in PrestaShop 8.2.6 and 9.1.1.
Workarounds
None.
Resources
- Reported by Savio at Doyensec (
[email protected]) in collaboration with Anthropic Research.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | prestashop/prestashop | all versions | 8.2.6 |
| 🐘Packagist | prestashop/prestashop | ≥ 9.0.0&&< 9.1.1 | 9.1.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for prestashop/prestashop. 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 prestashop/prestashop to 8.2.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-w9f3-qc75-qgx9 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-w9f3-qc75-qgx9 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-w9f3-qc75-qgx9. 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-w9f3-qc75-qgx9 in your dependencies?
O3 detects GHSA-w9f3-qc75-qgx9 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.