CVE-2017-6820 Cross-site scripting in n/a
An attacker can execute arbitrary scripts in a victim's browser via crafted CSS in SVG elements, potentially leading to session hijacking or data theft.
- 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
- Available
What is CVE-2017-6820?
CVE-2017-6820 is a medium-severity cross-site scripting vulnerability in Roundcube Webmail, published on 12 Mar 2017. 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
rcube_utils.php in Roundcube before 1.1.8 and 1.2.x before 1.2.4 is susceptible to a cross-site scripting vulnerability via a crafted Cascading Style Sheets (CSS) token sequence within an SVG element.
Weakness: CWE-79
Which versions are affected by CVE-2017-6820?
It affects 1 product.
Products include Roundcube Webmail.
How do I fix CVE-2017-6820?
Upgrade to a fixed version.
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-2017-6820 being exploited?
There is no known exploitation of CVE-2017-6820 in the wild and no public exploit code.
Other vulnerabilities in Roundcube Webmail
Sources
Also known as DEBIAN-CVE-2017-6820, DLA-855-1, GHSA-76mh-6w46-rwcg, MGASA-2017-0092, UBUNTU-CVE-2017-6820.