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CRITICAL severity

PrestaShop has a stored XSS executable in customer service viewGHSA-w9f3-qc75-qgx9

CRITICAL

GHSA-w9f3-qc75-qgx9 is a critical-severity (CVSS 9.3) Cross-site Scripting (XSS) vulnerability in prestashop/prestashop. A fix is available for prestashop/prestashop — see the affected versions and patch details below.

Also known asCVE-2026-44212
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-w9f3-qc75-qgx9.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs37th percentile — riskier than 37% of all scored CVEsHighest risk
0.00%0.31%0.62%0.93%0.0%0.4%Jun 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
🐘prestashop/prestashop🐘prestashop/prestashop

Real-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

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistprestashop/prestashopall versions8.2.6composer require prestashop/prestashop:^8.2.6
🐘Packagistprestashop/prestashop≥ 9.0.0&&< 9.1.19.1.1composer require prestashop/prestashop:^9.1.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for prestashop/prestashop, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. 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.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### 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.
O3 Security · Impact-Aware SCA

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PrestaShop has a stored XSS executable in customer…