CVE-2021-20840 Cross-site scripting in Booking Package - Appointment Booking Calendar System
Remote attackers can inject arbitrary scripts into the Booking Package appointment system, potentially compromising user sessions or data.
- 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-2021-20840?
CVE-2021-20840 is a medium-severity cross-site scripting vulnerability in Saasproject Booking Package - Appointment Booking Calendar System, published on 24 Nov 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 vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.
Weakness: CWE-79
Which versions are affected by CVE-2021-20840?
It affects 1 product.
Products include Saasproject Booking Package.
How do I fix CVE-2021-20840?
No fix has been published for CVE-2021-20840 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-2021-20840 being exploited?
There is no known exploitation of CVE-2021-20840 in the wild and no public exploit code.
Other vulnerabilities in Saasproject Booking Package - Appointment Booking Calendar System
Sources
Also known as GHSA-6wcx-352r-rcj5.