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CVE-2026-33673: PrestaShop has multiple stored XSS vulnerabilities via unprotected Template variables

March 25, 2026 (updated March 27, 2026)

Multiple stored Cross-Site Scripting (stored XSS) vulnerabilities in the BO: an attacker who can inject data into the database, via limited back-office access or a previously existing vulnerability, can exploit unprotected variables in back-office templates.

References

  • github.com/PrestaShop/PrestaShop
  • github.com/PrestaShop/PrestaShop/releases/tag/8.2.5
  • github.com/PrestaShop/PrestaShop/releases/tag/9.1.0
  • github.com/PrestaShop/PrestaShop/security/advisories/GHSA-35pf-37c6-jxjv
  • github.com/advisories/GHSA-35pf-37c6-jxjv
  • nvd.nist.gov/vuln/detail/CVE-2026-33673

Code Behaviors & Features

Detect and mitigate CVE-2026-33673 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions before 8.2.5, all versions starting from 9.0.0-alpha.1 before 9.1.0

Fixed versions

  • 9.1.0
  • 8.2.5

Solution

Upgrade to versions 8.2.5, 9.1.0 or above.

Impact 7.6 HIGH

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

packagist/prestashop/prestashop/CVE-2026-33673.yml

Spotted a mistake? Edit the file on GitLab.

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