CVE-2020-19002 Mezzanine Cross Site Scripting (XSS) vulnerability

What is CVE-2020-19002?

CVE-2020-19002 is a medium-severity cross-site scripting vulnerability in n/a, published on 27 Aug 2021. 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

Cross Site Scripting (XSS) in Mezzanine v4.3.1 allows remote attackers to execute arbitrary code via the 'Description' field of the component 'admin/blog/blogpost/add/'. This issue is different than CVE-2018-16632.

Weakness: CWE-79

Which versions are affected by CVE-2020-19002?

3 open source packages ship an affected version, including mezzanine and Mezzanine. It affects 1 product.

Products include Jupo Mezzanine.

How do I fix CVE-2020-19002?

No fix has been published for CVE-2020-19002 yet. Limit exposure of the affected software until one is available.

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-2020-19002 being exploited?

There is no known exploitation of CVE-2020-19002 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2024-25169 Mezzanine allows attackers to bypass access control mechanisms Critical 9.8
• CVE-2024-25170 Mezzanine allows attackers to bypass access controls via manipulating the Host header Critical 9.1
• CVE-2025-29573 Mezzanine CMS Cross-Site Scripting (XSS) vulnerability Medium 6.1
• CVE-2025-50481 Mezzanine CMS vulnerable to Cross-site Scripting Medium 4.8
• CVE-2025-6050 Stored Cross-Site Scripting (XSS) in Mezzanine CMS Admin Interface Medium 4.8

Sources

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

Also known as GHSA-fpv7-hx6r-9vcx, PYSEC-2021-343.