CVE-2021-46253 Cross-site Scripting in Anchor CMS

Medium 5.4 Published 1 Feb 2022 Updated 4 Aug 2024

Attackers can execute arbitrary web scripts or HTML via the Create Post function in Anchor CMS.

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

What is CVE-2021-46253?

CVE-2021-46253 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Feb 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A cross-site scripting (XSS) vulnerability in the Create Post function of Anchor CMS v0.12.7 allows attackers to execute arbitrary web scripts or HTML.

Weakness: CWE-79

Which versions are affected by CVE-2021-46253?

It affects 1 product.

Products include Anchorcms Anchor Cms.

How do I fix CVE-2021-46253?

No fix has been published for CVE-2021-46253 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-2021-46253 being exploited?

There is no known exploitation of CVE-2021-46253 in the wild and no public exploit code.

Sources

Also known as GHSA-7r9c-fccw-3vrf.