CVE-2020-21052 Cross-site scripting in n/a

Medium 6.1 Published 20 Jun 2023 Updated 10 Dec 2024

A remote attacker can execute arbitrary code via a Cross-Site Scripting vulnerability in the zrlog logging system's comment feature.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2020-21052?

CVE-2020-21052 is a medium-severity cross-site scripting vulnerability in n/a, published on 20 Jun 2023. 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 vulnerability in zrlog zrlog v.2.1.3 allows a remote attacker to execute arbitrary code via the nickame parameter of the /post/addComment function.

Weakness: CWE-79

Which versions are affected by CVE-2020-21052?

It affects 1 product.

Products include Zrlog Zrlog.

How do I fix CVE-2020-21052?

No fix has been published for CVE-2020-21052 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-2020-21052 being exploited?

There is no known exploitation of CVE-2020-21052 in the wild and no public exploit code.

Sources

Also known as GHSA-h3xp-rv2j-px7g.