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

What is CVE-2026-33673?

CVE-2026-33673 is a high-severity cross-site scripting vulnerability in Prestashop Prestashop, published on 26 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

PrestaShop is an open source e-commerce web application. Versions prior to 8.2.5 and 9.1.0 are vulnerable to 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. Versions 8.2.5 and 9.1.0 contain a fix. No known workarounds are available.

Weakness: CWE-79

Which versions are affected by CVE-2026-33673?

4 open source packages ship an affected version, including prestashop/prestashop. It affects 1 product.

Products include Prestashop Prestashop.

How do I fix CVE-2026-33673?

Upgrade prestashop/prestashop to a fixed version for your release line: 8.2.5 or 9.1.0.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-33673 being exploited?

There is no known exploitation of CVE-2026-33673 in the wild and no public exploit code.

Other vulnerabilities in Prestashop Prestashop

• CVE-2023-30839 PrestaShop vulnerable to SQL filter bypass leading to arbitrary write requests using "SQL Manager" Critical 10.0
• CVE-2008-5791 Other in n/a Critical 10.0
• CVE-2024-41651 Server-side request forgery in n/a Critical 9.8
• CVE-2022-31181 Remote code execution in prestashop Critical 9.8
• CVE-2021-3110 SQL injection in n/a Critical 9.8

All Prestashop Prestashop vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-35pf-37c6-jxjv.