CVE-2020-13758 Cross-site scripting in n/a
An attacker can execute arbitrary scripts in the Bitrix24 Web Application Firewall by bypassing filters with null bytes.
- 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-2020-13758?
CVE-2020-13758 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Jun 2020. 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
modules/security/classes/general.post_filter.php/post_filter.php in the Web Application Firewall in Bitrix24 through 20.0.950 allows XSS by placing %00 before the payload.
Weakness: CWE-79
Which versions are affected by CVE-2020-13758?
It affects 1 product.
Products include Bitrix Bitrix24.
How do I fix CVE-2020-13758?
No fix has been published for CVE-2020-13758 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-2020-13758 being exploited?
There is no known exploitation of CVE-2020-13758 in the wild and no public exploit code.
Sources
Also known as GHSA-wcg2-jvm2-p49v.