CVE-2020-9311 Silverstripe CMS XSS Vulnerability
Authenticated users can inject malicious scripts via profile information, leading to XSS attacks against other users in SilverStripe CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-9311?
CVE-2020-9311 is a medium-severity cross-site scripting vulnerability in Silverstripe Silverstripe, published on 15 Jul 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.
Weakness: CWE-79
Which versions are affected by CVE-2020-9311?
5 open source packages ship an affected version, including silverstripe/cms, silverstripe and silverstripe/framework. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
silverstripe/cms Packagist | All versions to 4.5.0 | None |
silverstripe/cms Packagist | All versions to 4.5.0 | None |
silverstripe Bitnami | From 3.0.0 | 3.7.5 |
silverstripe/framework Packagist | From 3.0.0 | 3.7.5 |
silverstripe/framework Packagist | From 3.0.0 | 3.7.5 |
Products include Silverstripe Silverstripe.
How do I fix CVE-2020-9311?
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-2020-9311 being exploited?
There is no known exploitation of CVE-2020-9311 in the wild and no public exploit code.
Other vulnerabilities in Silverstripe Silverstripe
Sources
Also known as BIT-silverstripe-2020-9311, GHSA-2pw2-qpcp-m47x.