Security Digest · Vulnerability record
CVE-2026-44212: PrestaShop has a stored XSS executable in customer service view
PrestaShop is an open source e-commerce web application.
CVSS 9.3 Critical EPSS 0.4% · p35
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.4%, percentile 35: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 35% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Only applies if your dependency tree includes
prestashop/prestashop(Composer (PHP)) < 8.2.6, fixed in 8.2.6;prestashop/prestashop(Composer (PHP)) >= 9.0.0, < 9.1.1, fixed in 9.1.1. Check your lockfile, including transitive dependencies.
What it is
PrestaShop is an open source e-commerce web application. Prior to 8.2.6 and 9.1.1, there 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. This vulnerability is fixed in 8.2.6 and 9.1.1.
From the GitHub advisory
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.
Weakness type: CWE-79.
Product: prestashop/prestashop (Composer (PHP)) · Assigned by: GitHub_M · Published: 2026-05-14
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Composer (PHP) | prestashop/prestashop | < 8.2.6 | 8.2.6 |
| Composer (PHP) | prestashop/prestashop | >= 9.0.0, < 9.1.1 | 9.1.1 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| PrestaShop | PrestaShop | < 8.2.6, >= 9.0.0-alpha.1, < 9.1.1 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_M | 3.1 | 9.3 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
| GitHub | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: required (a user must click/open something)
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.42% probability of exploitation activity in the next 30 days; percentile 35.
Timeline
- — GitHub-reviewed advisory GHSA-w9f3-qc75-qgx9 published (critical)
- — CVE record published by GitHub_M
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-w9f3-qc75-qgx9 github.com
- CVE.org record CVE-2026-44212 cve.org
- NVD entry CVE-2026-44212 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
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