GHSA-34q6-xqxh-gq39 Silverstripe XSS In rewritten hash links
An XSS vulnerability in SilverStripe allows attackers to inject HTML via query strings due to unsafe rewriting of hash links, potentially leading to code execution or account takeover.
- 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 GHSA-34q6-xqxh-gq39?
GHSA-34q6-xqxh-gq39 is a cross-site scripting vulnerability in silverstripe/framework, published on 23 May 2024. 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
A high level XSS vulnerability has been discovered in the SilverStripe framework which causes links containing hash anchors (E.g. href="#anchor") to be rewritten in an unsafe way.
The rewriteHashlinks option on SSViewer will rewrite these to contain the current url, although without adequate escaping, meaning that HTML could be injected via injecting unsafe values to any page via the querystring.
Due to the nature of this issue it is likely that a large number of SilverStripe sites are affected.
Which versions are affected by GHSA-34q6-xqxh-gq39?
4 open source packages ship an affected version, including silverstripe/framework.
| Package | Affected | Fixed in |
|---|---|---|
silverstripe/framework Packagist | All versions | 3.0.13 |
silverstripe/framework Packagist | All versions | 3.0.13 |
silverstripe/framework Packagist | From 3.1.0 | 3.1.12 |
silverstripe/framework Packagist | From 3.1.0 | 3.1.12 |
How do I fix GHSA-34q6-xqxh-gq39?
Upgrade silverstripe/framework to a fixed version for your release line: 3.0.13 or 3.1.12.
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-34q6-xqxh-gq39 being exploited?
There is no known exploitation of GHSA-34q6-xqxh-gq39 in the wild and no public exploit code.