CVE-2019-7939 Magento Reflected cross-site scripting on customer cart page

What is CVE-2019-7939?

CVE-2019-7939 is a medium-severity cross-site scripting vulnerability in Magento Magento, published on 2 Aug 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A reflected cross-site scripting vulnerability exists on the customer cart checkout page of Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. This could be exploited by sending a victim a crafted URL that results in malicious javascript execution in the victim's browser.

Weakness: CWE-79

Which versions are affected by CVE-2019-7939?

6 open source packages ship an affected version, including magento/community-edition. It affects 1 product.

Products include Magento Magento.

How do I fix CVE-2019-7939?

Upgrade magento/community-edition to a fixed version for your release line: 2.1.18, 2.2.9 or 2.3.2.

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-2019-7939 being exploited?

There is no known exploitation of CVE-2019-7939 in the wild and no public exploit code.

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• CVE-2020-9576 Magento command injection vulnerability Critical 9.8
• CVE-2020-9578 Magento command injection vulnerability Critical 9.8
• CVE-2020-9579 Magento Security mitigation bypass vulnerability Critical 9.8
• CVE-2020-9580 Magento Security mitigation bypass vulnerability Critical 9.8

All Magento Magento vulnerabilities

Sources

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

Also known as GHSA-r728-jwf5-f5r5.