CVE-2020-21054 Cross-site scripting in n/a
Remote attackers can inject arbitrary scripts via an unsanitized variable in FusionPBX, potentially leading to session hijacking or malicious actions.
- 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-2020-21054?
CVE-2020-21054 is a medium-severity cross-site scripting vulnerability in Fusionpbx Fusionpbx, published on 20 May 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) vulnerability in FusionPBX 4.5.7 allows remote malicious users to inject arbitrary web script or HTML via an unsanitized "f" variable in app\vars\vars_textarea.php.
Weakness: CWE-79
Which versions are affected by CVE-2020-21054?
It affects 1 product.
Products include Fusionpbx Fusionpbx.
How do I fix CVE-2020-21054?
No fix has been published for CVE-2020-21054 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-2020-21054 being exploited?
There is no known exploitation of CVE-2020-21054 in the wild and no public exploit code.
Other vulnerabilities in Fusionpbx Fusionpbx
Sources
Also known as GHSA-6p53-6566-mqvv.