GHSA-r97r-64vp-fghm Silverstripe XSS vulnerability via VirtualPage
An attacker with CMS access can inject malicious HTML into VirtualPage fields, leading to cross-site scripting attacks against other users.
- 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 GHSA-r97r-64vp-fghm?
GHSA-r97r-64vp-fghm is a cross-site scripting vulnerability in silverstripe/cms, published on 22 May 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A cross-site scripting vulnerability has been discovered in the VirtualPage class.
This vulnerability can only be exploited if a user with CMS access has posted malicious or unescaped HTML into any of the textfields of a page which a VirtualPage refers to.
This has been resolved by ensuring that VirtualPage safely escapes all field content.
Which versions are affected by GHSA-r97r-64vp-fghm?
2 open source packages ship an affected version, including silverstripe/cms.
| Package | Affected | Fixed in |
|---|---|---|
silverstripe/cms Packagist | From 3.1.0 | 3.1.10 |
silverstripe/cms Packagist | From 3.1.0 | 3.1.10 |
How do I fix GHSA-r97r-64vp-fghm?
Upgrade silverstripe/cms to 3.1.10 or later.
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 GHSA-r97r-64vp-fghm being exploited?
There is no known exploitation of GHSA-r97r-64vp-fghm in the wild and no public exploit code.