CVE-2021-27731 Cross-site scripting in n/a

Medium 6.1 Published 2 Mar 2021 Updated 3 Aug 2024

Stored XSS in Accellion FTA allows attackers to inject scripts via crafted POST requests, potentially leading to session hijacking or code execution.

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-2021-27731?

CVE-2021-27731 is a medium-severity cross-site scripting vulnerability in n/a, published on 2 Mar 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

Accellion FTA 9_12_432 and earlier is affected by stored XSS via a crafted POST request to a user endpoint. The fixed version is FTA_9_12_444 and later.

Weakness: CWE-79

Which versions are affected by CVE-2021-27731?

It affects 1 product.

Products include Accellion Fta.

How do I fix CVE-2021-27731?

No fix has been published for CVE-2021-27731 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-2021-27731 being exploited?

There is no known exploitation of CVE-2021-27731 in the wild and no public exploit code.

Sources

Also known as GHSA-r77v-287j-34fv.