# 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.

- **Severity:** Not scored
- **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:** Yes
- **Published:** 23 May 2024

## 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 | Ecosystem | 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.

## 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.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-34q6-xqxh-gq39 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of GHSA-34q6-xqxh-gq39 in the wild and no public exploit code.

Affected packages and fixed versions:
- silverstripe/framework (Packagist): affected all versions; fixed in 3.0.13
- silverstripe/framework (Packagist): affected all versions; fixed in 3.0.13
- silverstripe/framework (Packagist): affected from 3.1.0; fixed in 3.1.12
- silverstripe/framework (Packagist): affected from 3.1.0; fixed in 3.1.12

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/GHSA-34q6-xqxh-gq39/ (Markdown: https://insights.sbomify.com/GHSA-34q6-xqxh-gq39/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-34q6-xqxh-gq39

---
From sbomify Insights: https://insights.sbomify.com/GHSA-34q6-xqxh-gq39/
Summaries are generated and may contain mistakes; the official description above is the record.